man if you can afford it, get yourself the 702TSV, its so nice to have a super bright monitor. Another reason for a xenarc whether its 702/706/700, is the auto switch, so if you're going to get a reverse camera, definitely get a xenarc. Otherwise get yourself a 629 and save the cash.
so my suggestion:
1) if you might install a reverse cam get urself a xenarc regardless of model
2) if you don't need reverse cam, get a 629 and save urself the money
3) Look at my 701TSV, which is priced around the 700TSV, and is also a very nice option: http://www.mp3car.com/vbulletin/vbcl...?do=ad&id=2047