Windows 8 will probably work. However, think about 2 things:
1. Windows 8 vanilla support will end in 2 years, while windows 7 support will end in 2020, maybe later.
2. The only reason to use 8 is if you want to use metro apps. If you really do, getting a windows phone would make more sense.
I don't know much about going back to 8.0 from 8.1 while keeping everything. Look on the MDL forums, if it's possible, the solution is there.
CPU: AMD Phenom II X4 810 @ 3250MHz | RAM: Kingmax 2x2GB DDR2 800 @ 833MHz| MoBo: MSI K9A2 CF v1.0 (BIOS: 1.D)| GPU: Asus HD 6850 1024MB (DirectCu) @ 850/1150MHz | Display: L24FHD | PSU: PC Power & Cooling Silencer 750 Quad | OS: MS Windows 7 Pro x64
CPU: Pentium 4 Northwood S478 @ 3200MHz | RAM: 1,5GB DDR 400| MoBo: Gigabyte GA-8S661FXMP-RZ | GPU: ASUS Radeon X1650 Pro 256MB | Display: Dimarson 19" CRT | PSU: Noname 400W | OS: changing twice every week...