touch screens aren't all they're cracked up to be. I'd say if you want a touch screen get an iphone they are the only ones that work well. I've just got a nokia 5530 and its rubbish slow, pain to update, touch screen is very cumbersome .. stay away!
I think the problem is it costs for a decent touch screen so if you go cheap you'll have nothing but problems. a lot of these phones seem quite good on options or when you first get them but after a couple of months they start to fall to bits and won;t work properly.
If the phone crashes (which they do, after all they are just small computers) then you are really in it as you cant access the keypad to dial. I wont bother with a phone that doesnt have a keypad in future unless I get an iphone. Ive got an ipod touch and they are the business easy to use, reliable and easy to update.
Blackberrys are good smart phones if you want something with great functionality, not much in the 'fun' stakes though.