Glad I found this thread. I just switched from a Nextel 7520 to a Sprint 8703e. Main reasons for the switch:
1. Better coverage with Sprint in this area
2. According to our wireless consultant, 7520's are hard, if not impossible, to come by now that they're being phased out. We can either wait for our current devices to become worthless, or trade them in now for a $50 credit per unit.
3. Size difference (most of us hate the 7520's bulkiness)
4. Battery life (haven't confirmed this yet, though)
So far I've noticed almost every item that Pacer mentions, but most are not major negatives for me. For the ones that are, I'm hoping to get some useful feedback here so that I can answer/fend off any questions or complaints from the users... :P Yes, I'm the IT support guy AND I was 'influential' in the decision to switch.