Im new here guys, and the thread title says it all. Im trying to decide between the two. I have the 2010 27 Quad, but I'm thinking about upgrading. I don't know if this would be an upgrade or a set back. I want the thunderbolt ports. Plus I've had issues with my iMac's screen looking like some one with dirty hands put their hands on a clean white sheet of paper(that's the only analogy I can come up with). BTW any cases with the dirty looking screen on the New iMacs?? I really want to know which is faster, the iMac 27 quad i7 2.93 with 4gb ram or iMac 27 quad i5 3.2 8gb ram turbo to 3.6? I'm only recording music, but not virtual instruments. I have an Apogee Symphony headed here. I will be recording multiple instruments simutainiously, and I want my system to keep up. Any help is greatly appreciated.