I wouldn’t want a dual core in my netbook. I think it would just be way to much to cool down inside that little guy. Besides its only for internet use. If you plane to play video games your out of your mind.
Whats your budget? The one you were looking at is $500. Is there a reason you want a netbook? For $500 you could go get a laptop that is much better. Or if you willing to wait i would use that $500 to get myself a tablet PC. So far the one i have found the best is made by Archos. It can even play HD on the little guy.