Re: Advice on new business /mmo pc..
I think you meant to say 780i motherboard. If that's what you meant you should avoid the 780i board. I heard a lot of really bad things about it. I think a lot of people here will suggest you go with the 750i FTW. Unless you are going to install triple graphics cards the 750i is your better choice.
If the MMO your playing is WoW keep in mind that you can build a pc for under $600 that will max out WoW. Age of Conan takes a bit more power though.
Evga nForce 680i sli Motherboard
Apevia Blue X-Cruiser Case
Dell UltraSharp 2408WFP-HC Monitor
Logitech Z-5500 5.1 Speakers
Logitech G5 Mouse