Hmm, I happen to have two PDAs sitting around that I don't use.

1) Dell Axim X5
- Has CF and SD slots
- I have both bluetooth and Wifi cards. Also have a GPS card.

2) Ipaq 4150
- Has SD slot
- Built in Wifi and BT
- More than $200

I agree with Phillip; the 4150 is a really nice PDA. In my opinion, the X5 is sorta clunky... it just doesn't feel as nice as the ipaq.

Let me know if you want more details.