what's the best (fastest) rom for a sprint mogul?

[avoges]

Point taken. I have the "stock" WM 6.1 sprint rom and I run System Seven (beta) for push mail and have SPB phone installed. Besides that, I basically text, email and use IE and I notice that my memory goes from 70% to 96% before it basically stops responding. This can occur after as little as two hours of use... In anyone's experience would no2chem's rom be better for my use? Also, is system seven a memory hog (or leaker)? I never had trouble with it on my touch but it had more ram too...