Well the chances of me ever using more then 1 gpu are slim as I rather just upgrade to the most powerful gpu around at the time usualy and be done with it.
Currently I use a tv card and this is a must, this is PCI-E. I also have a sound card and that is PCI I believe off the top of my head. Apart from that I don't have any immediate use for more.
The only thing I want the board to do is overclock and be reliable. I have a x38 quadGT and it doesn't overclock at all any more. I think the mobo was pretty duff when I got it but I couldn't send it back as it's technicaly not "faulty" any overclock over 300FBS causes my pc not to boot pretty much. It used to do 400fbs if I really pushed but not any more. Am really dissapointed . I wouldn't be upgrading if I could still run my q6600 at 3.4-3.6ghz but at 3ghz it's causing me to lag sometimes I think.
Cheap as possible is always a plus. While I could spend £1000 I think i'd rather just save it for spending at uni and try and keep the upgrade under £500. I'm not even sure if i'm taking the pc up with me this year, I just want something to do hahaha.
:EDIT:
I'm not a benchmarker so i'm not bothered if It won't hit the peak. But a good healthy overclock out of what ever i7 I buy is a must so that it lasts me another gpu upgrade. What is the difference between the 860 and 930 really? The 860 has a lower wattage which I find strange.