Thanks, getting a lot of information on the sprintusers.com forums. Seems the a900 or a900m is my best bet as it will allow me to turn off the NAI feature sprint uses to track phone-as-modem usage. It's also very small (about the size of the razr). Combined with the current SERO plan it looks like I can get away with $50/mo for unlimited everything and 500 anytime minutes (I rarely use more than 300 as is). The only catch is their unlimited data plan does not technically cover phone-as-modem (PAM) usage; However, it seems as long as you don't raise any flags by transferring ALOT of data every month, you should be fine. Otherwise you can purchase their unlimited phone as modem plan for $40/mo in addition to your voice plan and be completely unrestrained in your data usage.

Now I just need to figure out how I can get out of my helio contract without paying the early termination fee (ETF)