There's no doubt, imho, that Apple is the way to go. If your not going anywhere with your computer and you've got a spare monitor sitting around the the Mac Mini is a very fine machine, just get the highest spec you can afford. No monitor, then get an iMac, again the highest spec you can afford. They both come with Garage Band for free and Logic would cost you £199.99p, https://itunes.apple.com/gb/app/logic-pro-x/id634148309?mt=12 and Logic is about as good as you can get. Opinions will vary of course.