The difference between a $1.5k Windows machine and a $4k Mac, with the intention to use either for the next 4-5 years, is nothing compared to studio budgets. Audio engineers spend tens of thousands just on room treatments, thousands more on analog mic preamps, and you need a hefty collection of different microphones. This is all so that you can bill studio time at $500+ per hour and produce great recordings. Any time you're spending diagnosing blue screens and Windows driver issues is time not booking artists and preparing mixes. OS X happens to be the first-class platform for most DAWs like Ableton, and the only choice for Logic, so you're limiting yourself not using a Mac.