It's going to be reasonably difficult to build a computer possible to run games at 5760x1080 (assuming that's what you mean by 3 1080p monitors). I might be wrong though, maybe you can squeeze in a couple of 7870s or something.
LG 24x Super Multi Internal SATA DVDRW DL Drive -
$15.99 $15.99 http://
Zalman Z11 Plus ATX Mid Tower Computer Case
after Rebate http://
Crucial Ballistix Sport 8GB DDR3-1600 PC3-12800) C
$59.99 $59.99 http://
Grand Total $723.38
After Rebates appro $655
You could get an FX-6300 and a 970 or 960 motherboard for a bit better performance/dollar, as well as getting the 7870XT would be a nice addition, this combined could really benefit your build as a whole.
Anyways everything else on this list is fine, though a z77 motherboard for an i3 is a bit of a silly idea as you will never use it, H77 or B75 would do just fine. As well as the Cooler, since you can't overclock why get one?
Here you go a system that will overclock and has room to grow.
MSI Z71A-G41 54.99 WITH 10.00 REBATE
CORE I5 3570K 189.99
EVGA 02G-P4-2661 GTX 660 SC 229.99
CRUCIAL BALLISTIX 8 GIG DDR-3 1600 59.99
CORSAIR CX 600 64.99 WITH 10.00 REBATE
DIABLOTEK EVO MID TOWER 37.99
TOSHIBA 1TB 7200 RPM SATA 6.0 59.99
COOLER MASTER HYP 212 EVO 29.99
LG 24X SUPER MULTI DRIVE 15.99
With $20.00 in rebates not counted in build