I live in Hayward,CA and I also had the Droid.
I saved about almost $100 dollars a month when I made the switch to sprint.
My friend and I split the bill and we were paying $200 a month on Verizon(1500 Minutes, 2 Unlimited data, Unlimited text & Insurance)
Now on sprint we pay $125 after taxes and that gets us 1500 minutes and unlimited everything plan.
Also by far Sprint has been better in reception and call quality as well IMO.
Also in the S.F and San Jose area I have been able to get 6-12MBPS download speeds which is pretty nice as well.
I'd say make the switch you always have 30 days to try it