I think it would have been better to compare this build to the iMac or the Mini. While I definitely applaud osx86 builds, I don't really find this build comparable to a Mac Pro of any recent generation. I think a much better comparison build would have been to upgrade an older Mac Pro 3.1 or 4.1 (EFI64 being the key) to 12 core with maximum ram and video card upgrades. I think right now the 4.1 is the sweet spot (considering memory prices). But even if someone maxed out the build, I don't think it would come close to the new 2013 Mac Pro. Another thing to think about here, especially for developers, is the software aspect of hacked/upgraded osx builds. When Apple releases a new OS version, or a new Xcode version, it might not work or it might be buggy / unstable. This is what happened with my old Mac Pro 1.1 and OSX 10.8 (flashed to 2.1 and upgraded 8 core 3.0ghz w/ 32gb). I was able to get up to 10.7 but 10.8 is messed up and the new 10.9 look like a no go. Which is why my old Mac Pro is now an ESXi Server (working on getting v5u1 working so I can run osx 10.8 virtualized)