If you want the WI-FI only the VX6700 and the samsung i730 have wifi, the Treos dont have built in wifi. You can buy a wifi card for it though. Same with GPS, PDAs are not GPS out of the box like some of the navigator phones like the chocolate. If you have the Mot V710 then you should be able to get a NE2 credit, those things are seriously old. If you know your contract end in the spring then your NE2 is 2 months before the end of the contract. You should also check the Motorola Q, thats a good device, cheap and does most of what PDA's do and has a thumb wheels to scroll like a blackberry, its not touch screen though. Ohh my girlfriend is selling her VX6700, its has a few accessories and an extended battery, I think she wants like 200 bux for everything. Its in perfect condition, she just changed jobs and doesnt need it anymore, she used to be a manager for verizon as well. That way you wouldnt have to sign a new contract and pay $299 just for the phone and $59.99 for the batt and more for the rest of the accessories.
The SCH990 is an ok phone, I dont know why would someone pay over 300 bux for a phone that doesnt do much more than take pics and video. For that high resolution I have a digi cam otherwise the 1.3mp cam on my phone is more than enough.