+1 for the SSD.
I dont think there is any point adding any more gfx cards or replacing the 5970 until either antilles or the next gen (of which I guess nvidia will be first this time round).
If your not down for the SSD, it has to be either a 120hz monitor or eyefinity. I tried eyefinity the other day and it is actually something to behold. Provided you can find a higher enough quality monitor with a slim enough bezel. The ideal would be three slimline 1920x1200 120hz monitors, but they dont seem to exist yet :/
I dont think there is any point adding any more gfx cards or replacing the 5970 until either antilles or the next gen (of which I guess nvidia will be first this time round).
If your not down for the SSD, it has to be either a 120hz monitor or eyefinity. I tried eyefinity the other day and it is actually something to behold. Provided you can find a higher enough quality monitor with a slim enough bezel. The ideal would be three slimline 1920x1200 120hz monitors, but they dont seem to exist yet :/

). I'm not gonna upgrade yet
. I thought a single 5850 was powerful enough at 1920 X1080p.