If you're used to AVR, then just stick with that. What you're looking to do is well within the capabilities of either architecture, and I think AVR will give you room to grow.
"you're a doctor.... and 27 years.... so...doctor + 27 years = HATORI SOHMA" - RoyalWing, when I was 27
"Al hail the forum editting Shooby! His vibes are law!" - Osaka-chan
I could still be champ, but I'd feel bad taking it away from one of the younger guys. - George Foreman