HTC Touch Pro2). I currently use an HTC Touch Pro2 (the Verizon version) and I've been very happy with this smartphone. So, if you're looking for a nice Windows Phone that has a big screen, a slide-out QWERTY keyboard, and excellent features, then you will be pleased with the Tilt2.
I really like the TouchFLO 3D interface for finger-friendly input and navigation. My smartphone is also my primary GPS navigation device.
Since the Tilt2 runs Windows Mobile 6.5, you won't have any problems finding medical applications for it (the same is true for the Touch Pro2, which currently may run Windows Mobile 6.1 but will soon receive an official upgrade to Windows Mobile 6.5).