GTD Newbie + Outlook + BlackBerry

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Hi. I just finished reading GTD and I'm ready to start! I already use a desktop version of Outlook and use it primarily for contacts, calendar and notes but I want to take my info on the road in digital form. I use Gmail and Yahoo for my email. I'm ready to purchase a BlackBerry but have no idea which model syncs best with Outlook. My carrier is Verizon (only one with good coverage in this area). Any help/advice would be much appreciated. Thank you in advance for your time.

p.s. Forgot to mention that I am a small business owner (self employed) so I'd be using a handheld Blackberry and not a company server network. From some of the research I did yesterday online I read that BB's don't sync well with handhelds as they do with a company server network. Is that true?