I just upgraded Titanic. I had an i7 960 with 2 6850's in Xfire and a regular spinner 7200 RPM drive, and an Asus 24" LED.
I went to a much faster system now. i7 3930k, Asus RIVE Rampage 4 extreme MB, Corsair 4x4gig Dominator 1866 ram (super fast, expensive too, 180$), I had originally put a 690gtx card in it, but ended up trading it away in a trade deal, and now have 2 680 4gig FTW in SLI from eVGA, Samsung SSD drives 2 128 in RAID 0, a Caviar black 7200 1 gig storage, all in a corsair 800D case, with the corsair h100i (the new better one) water cooler. I've gone to 3 monitor now as well, with 3 BenQ 120hz 24" gaming monitors, on a stand that cost almost as much as the effing monitors. I overclock the 3930k, it's a real champ for overclocking and the RAM I bought doesn't hurt either.
Even the older system ran this mod fairly well, but it can really test a system when you put 25 thousand troops on the field for sure. I can't wait for Rome 2, it's one of the games I built this new system for. For now I can run anything at full blast detail on 3 monitors at 57whatever by 12whatever the max is for resolution on these things. BF3 stays pegged at max in ultra, same as all the COD games. Aces High I can crank up everything and still see 59/60 no matter how many cons or puffy ack I see. My old system couldn't do that on a single monitor, even though it was usually 60fps with some of the settings turned down a smidge or two.