I don't ahve the regular A700, so only seen a friends, but have a test unit A710 (maybecome the 720-3D-_) and it is the step up waited for, but they need to do something with the usb port that is so tight. and move the power charger port.
Go for what you need. THe A700 is great for more gaming but not a hudge leap. THe 3d version is a bigger leap for 1080p 3D (please not it gives depth in 3D movies and nvidia games, some things come out but not all that much-well the nvidia demo is all that seems to have anything that pops OUT some). Yet the estimated price is WAY UP THERE for an acer.