Well I got the Sony 70 550r last night. Swapped out the Vizio m701d for it. BAD IDEA!
While the Vizio has its own set of issues related to flash-lighting and clouding (light bleed). The Sony too has these issues (except flash-lighting because there is no smart dimming) and some other issues that make Vizio the way to go in this price range.
The VESA (It didn't come with screws!?) on the back of the Sony are not standard 400x400 and they are almost all the way at the bottom. Luckily my mounting brackets still worked but not great. The base (bottom) of the TV is way to thick and it makes the TV stand way out from the wall and doesn't look good.
The bezel is almost exactly like the Vizio "E" series from last year. But the Sony's is probably a bit wider and thicker. I can't believe Sony released something like this in 2013. WOW. Looks bad.
HDMI and other inputs:
This TV was not meant to be hung on a wall. There are only two HDMI ports that don't plug in perpendicular to the screen. All of the other ports cause the cables to bend against the wall and push the bottom of the screen out even further (HORRIBLE DESIGN). The ARC HDMI port is like this so using ARC is out of the question unless you want to find a special HDMI cable to might be thinner (prefer high shielding/quality). The Ethernet, Optical and other ports are the same way plug in perpendicular too SUCKS. I have one HDMI cable going from my AV receiver into the TV and an optical cable going from the TV to the receiver. All media runs through my receiver except the media produced by the TV itself (NetFlix, Vudu, Hulu, etc) but let me explain why this sucks next.
The Bravia Sync is a joke. It works, but good luck trying to get it to do any custom set ups. EX-1: Tried to watch NetFlix using the built in NetFlix app from the TV. Want to send the sound from the TV via optical out to the receiver. When I change the receiver to use the sound from the optical port (because its currently sending DirecTV sound) the TV picture magically disappears. It doesn't turn off it just goes black and it doesn't change inputs. Remember that the TV picture is using its built in NetFlix app so it doesn't really matter what input the TV is in since its producing its own media. Oh and there is still no sound coming out of the receiver. So the only way sound works in these apps is through the TV BLOWHOLE!. EX-2: Tried Bravia syncing with my bluray player. It worked so I told the TV to switch to the blu ray player. The TV automatically changed my receiver to use the correct port (HDMI4) which was nice. But while the blu ray was playing I wanted to switch back to TV to see something else and allow the bluray player to play in the background and I would switch back when I wanted on my own time. On the receiver remote I switched it back to HDMI 1 but somehow the TV said NO NO that's not what you really wanted to do let me just switch that back for you. OMG! I had power off the blu ray player in order to switch the receiver back to HDMI 1. Remember that everything runs through my AV receiver so there is only one TV input in use. The TV doesn't adjust its own input which is correct but it shouldn't change my receiver input. Trust me when I say I looked through all the different settings (Disabling Bravia option was grayed out and I couldn't turn it off). And the other settings didn't appear to fix anything.
Vizio wins in the 3D category too. The Vizio had much better pop out and depth. Watching it from different horizontal or vertical angles didn't seem to produce much if any ghosting or cross-talk. However, the Sony, what a joke. The 3D doesn't have the same pop out or depth. I wanted to make it look like the Vizio TV so I adjusted the 3D depthness adjustment (which is available on the Sony) but you have to be right in front of the TV and at a perfect 90 degree vertial angle too or ghosting shows up really bad. The 3D glasses are lighter but they snap together like a cheap kids toy from McDonalds and you only get 4 paris instead of 8. The 2D to 3D feature is cool but I don't see myself using much if at all as its not great. Plus I only want to watch 3D content made for 3D.
I didn't watch any sports but right off the bat the picture was WAY to dimm. After turning off the ECO and light adjustments it came alive. I turned out the lights but now light bleed is REALLY bad during dark scenes. Not as bad as the Vizio was, but when the Vizio has its Smart Dimming on this issue goes away on the Vizio. There is no solution on the Sony unless you turn back on the adjustments which makes the picture dull. With the room lights on the TVs probably look the same. The Sony has some weird color issues when it comes to people's skin though. I played with the adjustments mentioned on this site but couldn't get the picture to look like my old Vizio. I can live with the flashlights on the Vizio shinning in from the sides any day compared to this Sony.
I'm sure some of you are going to say that there are settings in the TV that can fix these issues and I'm sure you're right. But, I don't want to deal with it since I just came from a TV that didn't have these issues. If you are considering one or the other, pick Vizio m701d.