OT- need a new GSM provider

Now that AT&T has followed T-Mobile's example by screwing the pooch on my cell phone billing, and I've flung yet another SIM-locked Motorola V600 out the window of yet another moving vehicle, and am about to enter into another year long "you violated the agreement first" small claims battle, I need a new GSM provider. I'm going to buy an unlocked tri-band GSM this time. Anybody had notable (good or bad) billing and/or customer service experiences with Voicestream or any other GSM provider with native coverage in the San Francisco Bay Area? (If you reply privately to me, I'll summarize back to the list.) -- Paul Vixie