Welcome to the forums.
You have a nice wife to finally let you upgrade to a new computer.
Anyhow, your list is pretty good, but I'd look around for alternatives and definitely shop around for deals.
I would look for a cheaper mobo then what you selected, look at the cheaper ASRock Z68 Extreme3 Gen3
for $125, btw Asrock is a cheaper asus, you get the same UEFI GUI. It also has the new pcie x16 3.0 slots compared the more expensive asus.
Since you have a microcenter nearby, assuming since you quoted it, I'd see if the i5 2500k deal for $150 plus $40 off if you bundle it with a z68 mobo is still on; just ask a service rep at the store. It was last week's deal, but those things tend to run for a while even when they stop advertising it as an in-store only deal. The 212+ is a great, cheap cpu cooler, stick with that. Find a cheap 120mm fan to add a second to the back side, but not necessary.
As for the ram, you really won't see any real world performance difference from 1866 ram compared to 1600, you are talking about 1-2% increase for $20-30 more per 8gb stick. But if you want 1866 rated ram, go with the G.Skill Sniper 1866 8gb (2x4gb)
set, its $75 a set, a little more expensive, but you can manually set the time to 9-9-9-24-2n with no problems most of the time. You can also OC it to 2133 with little issues as well. But honestly, just stick with some cheap g.skill, corsair, and such ram for 40-50 per 8GB set.
That same MSi 560ti OC 1gb
video card is on sale at us.ncix.com for $210AR.
And shop around for ssd's, specially the newer gens. While the M4 is a decent beginner ssd, the writes speeds suck. Look at the Corsair series 3 120gb
, its $180 (it was $136 on sale recently) on newegg right now and you get 550/510 read/write speeds compared to the m4 415/175.
You can get the cheaper 60gb ssd for your SRT drive, which will be an ssd cache disk for your normal mechanical disk drive, giving you the performance of an ssd, while the large master boot disk size for a cheaper price. It's only on the z68 boards.
As for your mechanical drive, look at the samsung spinpoint 1tb 7200 drive
for $60. Good, cheap, fast. nuff said.
As for the 750w psu, shop around, for that price, you might as well get an 850w. No way in hell should you pay $140 for a 750. You can find good ones for half that easily and they always go on sale. I'd look at the OCZ Z series 850w 80+ gold psu
, its on sale at us.ncix.com for $80AR. It's gotten good reviews and high praises. While OCZ is relatively new to the PSU area, their stuff is pretty damn good value for their prices. I've used them for the past year and actually just picked up that same 850 last week. Also, you can find 750w antec, OCZ and Cooler Master PSU for around the 50-70 price range on and off every other week.