You're simply not going to find the selection of applications available for the Blackberry. Figure out what you need and, as JSanders suggested, check here for anything comparable. If you're an "app freak" you'll be disappointed.
As for a piece of hardware, the BB is great. Best PDA phone I've ever had and I've had many. In your original post you speak about getting a Pearl. Not all the phones on your list are Pearls. I'd agree with JSanders (again) that the 8130 and 8830 are your best bets. The most obvious difference between them is that one has a full QWERTY keyboard and the Pearl uses its Suretype entry system. It's a matter of personal preference and screen size.
Were you using an Exchange Server with your i730? I was. It's a hosted Exchange Server and I added BES service to it for my Blackberry. Flawless. So far, I ain't lookin' back.
Last edited by LarryH : 12-14-2007 at 03:46 PM.