Default [Q] Most clean rom (using the least Ram)

Hi guys, i have been looking for some days for a Rom that is just basicly a portal to android (I am using android on SD) so i dont use WM at all atm except when i want to start android.

Can anyone advice me what Rom is best for this? i just want it as clean as possible that is using the last ram of all.

Thanks

Mithrandix