Here's my initial impressions and story of the LN46C630 I got on 3/19/10.
Have a HTPC with a 7300GS with sound going through a Kenwood reciever and was running video out of the video card via S-Video to a Sony 27" CRT set. Two PVR-150 tuners running Comcast cable, E6550 cpu, 2gb RAM, and Win7 Ultimate round out the system. Basic SD goodness.
My wife and I finally negotiated a deal so I could upgrade about 2 weeks ago (she's getting an iPhone). She would have been happy with a 24" LCD joking that it would be faster to knit a cozy to put over it - but I was looking at 46-47" models and cozys were definitely not a part of the program! With very little knowledge about LCD's I started looking and was drawn to a 2009 LN46B650 at Fry's running Quantum of Solace off of a Blu-ray in the audio area where the lighting was dim. The B650 in the TV area running their standard video loop also looked better than the other products adjacent, including the 2009 Samsung LED models. They had a 2010 7000 series on another aisle so it was difficult to directly compare, but to my eye the B650 still looked better.
I've done some research here and elsewhere and ended up a bit overwhelmed with the specs, model numbers, and 2009 vs. 2010 products. I decided to not get wrapped up in the specs and just go look at sets and buy what I thought looked good. My budget was around $1000, but I knew I could justify $1200 if the quality was there. I spent Friday afternoon at Costco, BB (actually great to look at Samsung products, they had about 12 46" models on display), Walmart, Sears, and finally Video Only (a west coast chain). Here's what I came away with - 1) the 2009 B650 and B750 sets all looked great but all that was left were floor models without remotes or stands at $1200+, or new in box for $1600+; 2) the 2010 LED models tended to look 95% as good but were $1400 and up; 3) LED didn't seem to add much value for the price premium, I would have paid $100 more for 240hz if I could have found something in my range, and the 3D demo at BB wasn't living up to 3D in the theater (not that I could afford it anyway); 4) the C630 looked 95% as good and was $999 at Video Only with a 2nd year warranty included.
As it was Video Only was my last stop, they had 46" B650, C630, and U7000 next to each other on the wall. I told the sales guy straight up that he was competing with major online e-tailers for my business, so he looked on his phone quickly and said he could go $950 with the 2nd year warranty included. This worked out to $1045 including WA sales tax, so I got it.
I agree that the semi-matte finish works great in rooms with glare issues. The TV is about 8 feet from our eyeballs and anywhere on the sofa gives a clean picture. I hooked up the set via a DVI-HDMI cable. The picture seems great to me. Running SD content seemed acceptable for what it is (with some artifacts around titles), 720p content is great and 1080p even better. We signed up for Netflix to get Blu-ray discs, we tried the streaming stuff and it looks DVDish. I'm not going to nit-pick my set, but a cursory look reveals no odd lighting and it seems uniformly black with no imbalance or bright spots.
I did have some issues with playing Office Space off of DVD, some laggy parts where there was motion in the picture. I replaced the 7300GS with a 7900GT that I have and this seems to have gone away being a matter of pushing enough bandwidth to the set.
My HTPC has a Blu-ray player in it already but unfortunately I learned Saturday that my video card is not HDCP compliant after buying PowerDVD 10 Ultra 3D (I know I can't use the 3D part) for $99. I'll order a new video card today, probably a 5750 or 5770 to rectify this. I also have an HD tuner card already on the way, a HVR-2250.
Overall I'm quite pleased with the set and that I was able to get this quality.My wife, a long-time TV hater, has even been showing signs of being won over to HD!
p.s. Almost forgot, we are using standard settings and have definitely found that switching between the standard, natural, and movie modes can help out the content we have. But some of this may also be us getting used to HD. We have a Spyder2 color calibration tool and will run it after the new video card arrives.