I haven't had any issues running 8 having upgraded from 7 when 8 was first released. Win 8 tiles system is pretty much useless for anything other than a phone or tablet. I like the Windows store and use of skydrive etc. but for most business applications I think Win7 might be the better choice.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70