My main reason for getting the Pearl was its size and it has been a good choice for me.
Suretype is a breeze when you get used to it too.
There isn't really anything that I dislike about my device at all. That said my next BB is unlikely to be a pearl type mainly cos I'm not too keen on the KickStart.
The curve is a good looking device but after trying it out I decided it wasn't for me as I found typing easier on the pearl but that's just me
Perhaps you need to try them out too before making a final decision. You may prefer the qwerty keyboard and
Bigger screen after you have a play with it.