Hi Martin - I just did the exact same thing you’re planning, only in reverse. I switched from Cubase 6.5 on Mac, to PC. The performance, same hardware, on Windows vs. OS X was hugely, significantly better, in my case. ASIO vs. Core Audio, PC Cubase vs. OS X Cubase, PC VSTs vs. Mac VSTs and AUs, Windows graphics drivers vs. outdated Mac graphics drivers all added up to a much, much more crisp and performant experience under Windows. Projects that would simply not play unless frozen – and even then seemed to tax the HD with the 32 bit freeze files almost as much as playing the VSTis – played back unfrozen, perfectly under Windows (same hardware).
All this on the same hardware. When you add to this how much faster and cheaper an Ivy Bridge PC can be built, it takes the already natively impressive lead and compounds it in a very non-linear way. You can be truly super-charged (for cheap) on a Windows solution. I mean, Apple hasn’t even told us if they’re even going to make new Mac Pros.
I lucked out in that my Mac Pro died and I was forced to build a new system. I was able to build a PC under 1000 bucks (in a 4U rackmount case) whose Geekbench score is about the same as the 5000 dollar 12-core (2010) Mac Pros. And, I’ve already confirmed that my little cheap homebuilt is faster than the preliminary benchmarks of the rumored Ivy Bridge iMacs, likely to be released soon. Let me say that again, I built a computer, already, that is cheaper and faster than one that Apple has not even released yet. And, it will be incrementally upgradable. In a few more months I’ll get a gamer’s CPU cooler and overclock it, then maybe get and SSD, then a new graphics card, etc.
I’m not trying to incite a platform war, on the contrary, I still use my Macbook Pro and Lion and love it – just not for audio production.
And I don’t miss my Mac Pro one bit.
Cubase rocks on Windows – I’ve seen this firsthand.
Best regards and good luck in whatever your decision ends up being.