first, ignore SSD for any new pc builds. SSDs are nice and maybe boost things a little, but just moving from an older PC to a new PC will be orders of magnitude better (I have a 64GB SSD too, it just makes shatt a little faster but on a great PC shatt is fast to begin with!).

second, I wouldn't do SLI if all you play is WoW. Yes, if you play FPSs and other new games then SLI is awesome, but WoW really won't do much (if anything) with SLI.

I'm debating when to build a new PC too (i have a dual core so its not as huge a rush for me), I'm going to wait and see how the new i7s are. My quick perusals so far show me that the price is going to be outrageous and the improvements mediocore, so imo the best strat is wait until they are released and then buy the quad core q9550 (or similar), Black Friday is coming up thanksgiving time and should be giving great prices on parts.

Also imo any new PC build should include 8GB and Vista64, its just crazy not too. Running 5 wow's under 8GB in Vista is a big improvement over 3GB in XP (remember, XP can only "see" 3GB of memory no matter how much you put in). And 100% definitely agree learn how to symlink, its again one of those small things that takes 10-30 mins to figure out and learn, and gives massive performance improvements.