So hopefully will be ordering a fusion high end 21.5er tomorrow. My old system had 3.3gigs of ram and I would generally eat up all of that. I do music composition and editing, and am an enthusiast photographer. Would 8GB really be enough, or am I going to want to stretch to 16? Cause I know once I buy the 21 chances are I won't be able to upgrade. How much ram does photo and general music stuff tend to take upo n modern machines?