What is the best wireless PDA phone?

[Oma]

I am looking for a PDA-Phone. The specifications are as follows:

- GSM Tri or Quad Band Phone service.
- WiFi
- Excellent Bluetooth (recommend headset pairing please)
- Large color screen
- Windows Pocket PC Mobile
- Skype Compatible
- Fast

Price is not an issue.

Nice to Have:
- 1.2 megapixel cammera or better with video
- keyboard
- 0.60" thin