Received the A200 yesterday and the HD700 earlier this week and after playing around with them for several hours here is my initial impression.
I like the HD700 but for whatever reason it could play my Mkv files with DTS HD audio fast. The only way I could fix it was to turn the lip sync on and then back off. I tried everything to get this to not be the case but no luck. I figured it was some sort anomaly because there is no way all those positive amazon reviews would exist if everyone's player did this.
I then got the A200 thinking it would solve my problems. And it did...but then created new ones. Initially it played everything as it should have and then without reason the truehd 7.1 audio on a mkv file stopped outputting. Through several minutes of putzing around settings I noticed that somehow the player switched to dvi output. No clue why. I switched it back and now the truehd audio was playing, but stuttering. Several more minutes of switching various settings back and forth and I got it to work. I should note that ultimately I don't think I changed anything in the settings from what they originally were, it just decided to work again after some switching around.
Then I played some dts hd mkvs. They appeared to play fine at first but after a few seconds I heard audio pops coming out of various speakers at several second intervals. I couldn't get this remedied so I tried these same files on the previous HD700 and they played fine after I did my little lip sync dance. Then for whatever reason I decided to try reformatting my hard drive and putting the test files back on. I did this and now everything played fine. I tried several more tests and everything seemed to play ok, so hopefully reformatting the drive fixed whatever issue.
As far as apps and the android experience on the A200, I wouldn't hold your breath. It's extremely underwhelming. I couldn't get xbmc to recognize my hard drive or files. Figuring out how to do simple things is a huge pain in the ass because there are no real instructions. Some buttons on the remote make no since.
I'm sending the HD700 back because the lip sync anomaly and I'll give the A200 a shot for a few more weeks, but it's on a short leash. I came close to boxing it up several times tonight, but if it can keep playing my mkvs with lossless audio then that's all I really want, I'm not going to use the apps or android functions. I essentially bought the A200 for $200 for it to function as the $140 HD700 should have, which sucks.