i liked it (i've since switched to a sony ericsson p990i - i missed having a camera, touchscreen, and a few other things). the blackberry is absolutely brilliant with the push email option. without push email, it worked well but no better than any other phone for just regular cell phone/organizer use. the full keyboard is great, so if you send a lot of text messages, you'd enjoy that. it bothered me that it was not capable of any data transfer via bluetooth (no syncing, no sending/receiving contacts, no bluetooth modem for powerbook), only audio with a headset.
i've had a treo before, and preferred the palm organizer functions over the blackberry. would you consider a treo instead? the 680 that should be out soon looks nice.
i think the pearl would be the best blackberry if push email is not really the focus. at least there's a camera and multimedia capability (if you want this, that is), though it lacks the full qwerty keyboard.
cingular definitely allows you the option to have a blackberry without the data/push email plan (i'd ordered the blackberry online even, and was not required to add the data plan). you may just need to call us cellular to be able to place your order without the plan...