Which version of the Palm for Sprint is the BEST and why?

I have considered buying a Palm for Sprint. I am very particular about functionality. The newest version of electronic devices IS NOT always the best (for example, the Apple iPod. I've found the sound quality of 4th Generation iPod is BETTER than the Video iPod!). Anyway, which version of the Palm phone for Sprint do you suggest is the BEST version?

I went for the Treo 700P as I just wanted a good phone and the ability to use Palm desktop without paying for all the internet stuff. I pay for just the 450 daytime and unlimited nights and weekends for the $45 includes taxes.

I am very satisfied SO FAR..

700wx, it has double system memory vs any other pda device. all have 128 mb and 32 allotted for system memory. 700wx has 64 mb alloted for system memory. That means less lag when navigating around device.