8gig ddr3 ram(gskill or corsair make good ram)
standard DVD drive
P67 or Z68 socket 1155 motherboard(evga, asus, asrock, msi, gigabyte are the best brands imo)
750w PSU(seasonic, corsair, antec, silverstone best brands imo)
AMD 6950 2gig or 6970 2gig depending what you can fit in.
HAF 922, any corsair case, Antec 902, CM690II few other nice cases that i cant think of
Coolermaster Hyper212+ heatsink to help cool your cpu.
Anyone else going to give rough estimates DO NOT suggest a nvidia card, you will need SLi(2cards) to have 3monitors, whislt AMD you only need one card hence why I'm suggesting the 6950 & 6970, make sure it's 2gig vram too, will help out running at 5760*1080(just assuming you'll be using 3x 1080p monitors