Definitely might be beating a dead horse on this one, but I feel my situation is unique enough to ask the community their opinions. I currently own a late 09 iMac, and a mid 08 Mac Pro. Both are in the tail ends of their time in my household and ready for some upgrading. Most of the work done on these two machines are pre production compositions using Logic Pro, and Avid Pro Tools. The intensive mixing post production is what's pushing these two boxes to the limit. So what I'm coming to you guys for is to ask for some advice, more so opinions on which you would upgrade first given what's on the market now. I can't afford to wait for the refresh on both lines before upgrading with many projects needed to be done for work. So given my budget, the upgrades are: 27" i7, tb/ssd combo with r4 pegasus thunderbolt drive or 3.3 6 core Mac Pro base (mainly for expandability) What do you guys think?