they're comparable machines - you just need to play with them (in the store) for personal taste.
i had a treo, went to a blackberry for work, and am back on the treo. i like them both for completely different reasons, both work well. getting my renewal and i'm also looking at the Q. big difference is in size, although one thing about bbs that I don't like is that when you're browsing a website, the pages come out funky. the Q (and the treos) display the pages very organized.
there's a new bb out to compete with the q. check that out as well.
Look at that... I plumb got myself 5 raisins and 7 termites.
Bookmarks