The internet is full of posts from people moaning about Windows 8 (and especially about how it seems to have been designed for mobile devices, such as tablets, with hardly a thought for desktop users). Admittedly there are also quite a few posts from people who seem happy with Windows 8 but there are very few that go as far as to suggest that it's actually in any way significantly
better.
Look for a Windows 7 PC, such as one of these
http://www.accomputerwarehouse.com/products/computing/windows-7-pcs
(I can personally recommend that dealer) and avoid having anything to do with the dreaded PC World!