Working off an older Mac pro. Looking to upgrade this year and would love to downsize. How much of a performance boost do i get from the current line of Macpros vs MacAirs w/Thunderbolt? I edit events, sizzle reels, local commercial, etc. No heavy effects. I've been schooled to believe that to be professional you have to work a Macpro. I feel like another Macpro would be overkill. I ran a few test edits on my friends 2 year old macair and I was able to cut the video just fine- (with media off the internal drive no less) I do not need any expansion. And thunderbolt devices are already out there if i needed one. I just do not see the point- but my old way of thinking keeps getting in the way.