RED
if you want
fast processor (400 Mhz +)
wifi
blutooth
Phone
good battery life
than wait a little bit more, cingular is comming out with a Cingular 8525 ( HTC Hermes) its the same thing as the 8125 but has a faster processor. I am waiting for this pocket PC as i have HP 6325 and i find the processor sluggish which is the same processor on Cingular 8125
I have read all the reviews all the PDA's and i find a PDA with PHONE/WIFI/BLUETOOTH/IRDA suits me a most and and eliminates carrying of two or more devices.
Pocket PC has hot swapable SD cards so you dont need a PDA with Big drive in it. You can always get coupe of SD and i dont think you will be needing more than 1 GB of space
other important thing is the battery life all the pocket PC with big processor like the Intel X-Scale eat up the battery life. so balancing the power and battery consumtion is important for a pocket PC
then the other important thing is the Phone feature. Thre reception and the call quality needs to be reviewed.
hope this helps you a little