IMO it's the $29.99 1200 talk/text from PPW.
1200 minutes, 1200 text messages, 50mb data
You can survive on 50MB data if you don't stream audio/video on your phone. I use this plan with a Moto Droid running Froyo and I read stuff online all the time using Opera Mini; I stay within the 50mb alotment without any issues.
I use about 700-900 mins of voice and at least 400-500 texts per month as well.
The ability to use any of the newest Verizon phones, plus Verizon's network, are huge plusses. I am on the lookout for an off-contract Droid X, but my Moto Droid is running quite fast these days on Froyo. Being forced to use something like an LG Rumor Touch on Virgin Mobile would be a huge downgrade.