If I really had that much spare money, and nothing else to spend it on, I maybe would... But I'd wait for Revision 2 of GigaByte's i-RAM and buy some of those as well (together with the loads of mem sticks)...
By the time the new i-RAM is out, I will be able to pick an overclocked BFG 7900Ultra @ 1250/3500MHz or so...

I wouldn't take SLI, just for the principle... It's a waste (states the guy who would buy all the abovementioned cr*p)...
EDIT: Honestly, I'd never buy it... It's an art to make the most of your money, even if it needs overclocking therefore... That's why I love my Sempy @ 2.4GHz and 6800GS @ 520/1200MHz much, much more than my Venice 3000+ @ 2.4GHz and 7800GTX @ 500/1350MHz...