I'm satisfied w/ the 2D quality. The 3D isn't perfect.. But watching Avatar was pretty stinkin cool.
I've never really experienced 3D other than in theaters. My current TV is a Sony Bravia LCD 720p from 2006 so I'm sure I'll be happy with this upgrade. 3D will have to wait a bit as I need to buy a 3D Blu-Ray player and some movies.