You're in the very enviable position of making a completely fresh start.
As someone who used to build 15 to 20 PC's a year I think you're missing a huge opportunity in discounting the Mac. Everything you mention plus linear digital video editing is built into every Mac. Plug in the power and the phone line/cable and it works.
The point to having a Mac is that they really are 'white goods' - like a fridge or freezer they just work while at the same time using standard PC components these days so you aren't raped when you want to add more memory or storage.
However, if you're embarrassed to be seen with a stylish and supremely effective system there's a lunatic selling modified Mac motherboards that will go into a standard PC case
$320 if you're interested
Regards
Rob