z68 is only useful if you are going to use Quick Sync. Were I to upgrade (happy with the i5 I have, ill just overclock for now), I'd be all over P67 + NF200 (for teh SLI)
Small SSD + data on spindle drives are impractical and self defeating for gaming for obvious reasons. I'd be inclined to get a 240 gig SSD if anything other than Raptors.
There is no real reason to go for a 2600 if you're gaming and not running a bunch of multithreaded workstation apps (hyperthreading being the main difference); the price / performance ratio drops right off between the 2500 and the 2600 (2600 is still great value though!) Don't bother with a multiplier unlocked CPU if not overclocking though lol.
The dual GPU cards are a waste of time and for those who are scared of SLI which is faster for the same price or at times even less. I haven't had any issues at all with mine, despite a lot of naysayers still being convinced things still are like they were during the time of the 8xxx series.
AFAIK, LGA2011 will be the uber expensive 'enthusiast' chipset and processors (given Intel's usual "tick tock" product releases). Overpriced to the max.
Go for more RAM speed over latency (I'm a Gskill fan myself), most people I know myself included are running 8 gig these days.