BEC in Micro-T?

[BP-Revo]

Hey, I have a Micro-T in a box sitting in my room that I was going to sell (its still stealed and brand new). I was going to run it with some buddies, but they never bought one, so I never opened it.

I want to run something with more power than the stock battery, but dont want to drop the cash on brushless. However, I dont want to risk the speed control by running 2S lipo. I was thinking of running the 2S through a BEC first, so the ESC receives only 6v. This should help alot, since the ESC will receive an absolute max of 6v and not stuff like 8.4 on a freshly charged pack.

The stock battery is 150mah, and I heard it runs for like 10 minutes, so amp draw can't be more than an amp or so at most. I figure a 3A BEC should be plenty for it.

Any thoughts?