Hello. I have a 15" mbp running with Lion. As Im about to replace de thermal paste and upgrade the ram, I was wondering if it would be better to fresh install Lion again or go Mtn Lion all the way. Ive read some topics about mtn lion and most of them show mixed opinions regarding specifically the battery life. Some say it got better, others, the opposite. It seems to depend on the models maybe? Well what do you think? Does the advantages of mtn lion (like speed) are worth the possible loss in battery time?