I had a late 2011 mbp 15 and installed a 16gb ram on it which is plenty enough to run few windows os. i just ordered the rmbp and it should be here in 5 days. i only ordered the 8gb ram cause it's the only configurations available. i would like to ask your opinions if 8gb plenty enough to run windows. i use windows to play games, software that is not compatible with mac but nothing like photography stuff in depth. i know it will be a future proof to go on 16gb ram. i would like to also know if the the ML uses alot of ram.