Finally made the decision - getting a Sprint HTC Mogul on Wednesday!
For quite a while now, I've wanted to go from two devices to one. I'm using an HP iPaq rx3715 for my Calendar and Contacts, and a Sprint Samsung A920 cell phone. After going around and around with all the options available with Sprint, I've finally chosen the Sprint HTC Mogul. It's got all the features I really wanted, not that there were that many of them, but I wanted Windows Mobile so I can sync with Outlook, a larger screen than most phones, and a larger QUERTY keyboard. The Sprint store had to order it - it's not something they keep in stock - I'm picking it up this Wednesday.
I want to thank my TwitterFriends @chrisrue @mas90guru @EdHans @callkathy and @judis217 for answering my questions and giving their opinions - you all were a great help!