are the Cxxx(x) series really that much better? I really like my 5500, except for the lack of built-in wifi. It's the one thing that has me looking at palm/windows mobile PDAs, they all come w/ built-in wifi now. I know I can get a wifi card, but you're only supposed to be able to get 30 mins. of life w/ the card in.
What makes the Cxxx(x) series so much better?