Mobile Phones and Plans

My contract with AT&T Wireless is up in January, so I've been scouting the mobile phone market, looking for deals. I've wanted a new phone for awhile, preferably one with web/email/AIM capability and possibly Bluetooth. The Treo 600 looks great, but it's too expensive. The T-Mobile Sidekick (a.k.a. Hiptop ) looks very nice, and I've read some good reviews. A major benefit of this device is that you can add unlimited data to your calling plan for $20/month. Also, if you buy the Sidekick from Amazon, you end up earning $30 after rebate, which is pretty crazy. The downside to the Sidekick is that it doesn't have Bluetooth.

Now I'm trying to determine the quality of T-Mobile's northeast Ohio coverage. I know Jason uses T-Mobile, and I haven't heard him complain. However, I've read some forum posts where people have complained about spotty coverage in certain parts of Cleveland. I'll probably just have to try the phone and return it if I'm not satisfied with the coverage.

Anyone have a Sidekick or used T-Mobile in Cleveland?