I used to have the 8830, loved it. I didn't stay the blackberry route for several reasons (mainly price, lower bill) but if I were to get back with Blackberry, it'd be the Tour hands down. Having said that, after having my iTouch for a few months, the iPhone is my next step. The touch screen is so damn easy to use and navigate - notifications for email, texts, FB updates, twitter etc. - which I'm sure all smart phones can do now.
A few of my friends have the Motorola Droid and I have fiddled with it a few times. It has a slide out QWERTY keypad with a D-pad for easy navigation if you do not wish to use the touch screen.
Tho all in all, I felt my 8830 was the quickest to navigate for emails and such. But for internet, it doesn't even come close to my iTouch.