Well it's been a few weeks now with my UN55F6400 and I have to say I'm quite happy with it. I see a lot of people reporting stuff like horrible side view and what not. Really, who watches TV from the sides? If you are that picky, go and find an old CRT and be done with it. :) (Relax people, I'm joking... Sort of)
So here's my review thus far. Details as follows.
Samsung UN55F6400 (Not sure what panel I have as I haven't researched to find out, I know it's a Samsung panel though at least)
Mounted on a Z-Line Z-Line Aviton ZL517-44MixU http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=4903803&CatId=5511 $99 on sale with coupon, hurry!
Connected to Yamaha RX-V475 via HDMI (HDMI2 - ARC)
Samsung BD-F5900 (3D Wifi)
HTPC (custom built HP, soon to be upgraded before it dies)
I watch OTA TV mostly, using my HTPC as my DVR so that source as a benchmark isn't really fair since the video is 1080i and all.
Everything runs through the AVR, just so we're clear as to why I don't report any of the sound issues some of you seem to have. Who uses the TV speakers anymore? Unless you're in a bedroom maybe.
The TV is fantastic. I've been messing with calibration settings and what not and I know I still have to find my personal sweet spot, but overall I'm happy with the picture quality. Having come from an LG 42LD450 this was a MAJOR improvement overall. Not just in picture quality but also in features. The TV has a great picture, despite the normal LED/LCD issues people rip on.
Yes, I have that annoying "ghost" image coming from all four corners of the screen when viewing really dark images, but it seems to fade away depending on content/source? Sometimes I notice it, sometimes I don't. Keep in mind, I only really notice it when the room is pitch black. With any lights on, I hardly can see it at all. I can't afford to spend another $1,000 to upgrade to a back lit panel so I'll "suffer" with it for now. I'm not really suffering, it's not that big of an issue really.
I've had to get used to the whole motion control thing. Using the preset modes can be tricky, that depends on the content really. But the custom setting has been good all around. Not too cartoon/soap opera like yet it clears up the motion quite nicely. I suggest the custom setting for this.
The Smart Hub is nice, not too slow and not too quirky. I'm used to the Samsung smart hub since I have their Blu Ray player and I had a Samsung Galaxy Tab so I'm familiar with their interfaces and what not. It's nice to have. I can't say much about streaming content because I don't use Netflix or Hulu, but viewing YouTube on it works pretty damn well. I've tried to cast things to it but had issues before. With the new software update, I'll give it another shot from my Nexus 7.
Networking features are pretty nice. I've got a lot of movies on my HTPC (MKV and other formats) and so far it's played them all quite nicely. I almost don't even use the HTPC for that anymore? I installed Plex to the TV and run the server from the HTPC, but honestly with DLNA and all I find that I can just use the TV's native software for that. It sends the audio nicely to the AVR, less switching for me.
I can't comment on 3D because I have yet to really get it to work. I don't know, maybe my eyes just can't view it. I have issues with one eye that screws with my depth perception so I think that's why. I've set up the glasses, pressed the power button a ton of times and noticed no change. I was using their 3D app to view sample videos and couldn't get anything, but that's no big loss since the few times I've seen 3D in the theaters, I was never really blown away by it. Maybe I'm doing it wrong or I should custom set up my 3D?
Again, I can't give a fair judgement on this because I never use the internal speakers. When I first set it up I heard them briefly and they sounded like TV speakers, I'm never impressed by them. The only time I'd ever use them is, well never? I can say if you're using ARC, be careful. Sometimes you have to switch your output format when you're using a new source/app. So just keep an eye out for that. Otherwise, once you get used to that then you'll be alright if you're hooked into an AVR/Sound system.
Like I said, major improvement over the old LCD I had. I originally was shopping for a Plasma, looking at a Samsung vs Panasonic ST60. I couldn't find the Panasonic ANYWHERE and when I went to the store, I wasn't as impressed with the Plasma as I thought I'd be. I know they aren't as bright, which IS a concern for me. I'd rather have too much light to turn down than not enough to turn up. I also wasn't blown away by the motion, but then again the source wasn't the greatest there. Still, I'd rather not invest as much into old tech that's going away. So that's my fair assessment to this TV. I can't really beat it up or threaten to return it because at this price point, you're pretty much getting what you pay for.
If anyone has any advice or input to what I've said, by all means please chime in.
Also look for my other post in the Bic Acoustech forum for pictures coming soon. I still am fine tuning my setup and just got a new TV Stand so I haven't taken great pictures yet of the setup.