Touch implementation on the iPad2 was the golden standard (for me) until two weeks ago when I started using the Asus Transformer and the Galaxy S II.
The former at least matches and the latter surpasses it, I think. In both, image and touch quality...
Diogen.
I haven't seen the Galaxy, but I still think the image quality on the iPad is very very good. I can't imagine what the retina display will be like on the 3.