This seems like a good opportunity to mention that I loathe Windows 8.1.
I run two workstation-class PC's, identically set up, saving the work out to a server. If one system goes down, I can just swear for a while, roll to my left and keep working with little loss. My top-specced Windows 7 machines were brilliant, lasting over four years. I usually swap over after three years.
The just-built smoking-hot Premiere Pro-ready PC's are Window 8.1. What an awful OS. Clearly Steve Bulmers parting practical joke to the PC users of this nice blue planet. I'm almost certain to write-off a day or two to go back to Win 7. Win 10 sounds
like a hugely improved OS, they need to consign Win 8 to history ASAP, back in the naughty corner with Win ME and Vista.
I'm platform agnostic with a two Macs as well as the PC's. OSX is very nice, but it's hard to get anything like the bang for your buck in a Mac compared to a custom built PC. In the unlikely event that Windows 10 is another epic-fail, it could be time to build up business and get a couple of top-specced Mac Pros.