These games are a natural for the iPad and the graphics don't scale well at 2x. Yes, I would buy them again!
I think that Triazzle would be phenomenal at HD, but I did not think it looked that bad at 2x. I had no troubles discerning the various colors or shapes. Also, Peggle is fine with me at 2x... But, again, HD would be phenomenal. I am also wondering if Bejeweled 2 (with ALL the modes) will be seeing an HD release...
Peggle is just fine 2X on iPad. I won't pay for an HD version unless it had like Peggle Nights for instance. Settlers of Catan I agree looks great just expand map a bit and no need to zoom in our out. One that I've been playing a ton of is Zooloretto. Graphics look just fine 2X and played it just night again with 4 people.