Purchase Date: Today
Monitors: 2 x 23 inch @ 1080p
Uses: Gaming, CS5, 3DS Max / Maya
Budget: $1600 - $1700
First off I would drop down to the 2600K. Your going to gain it all back and then some with a simple o/c that's going to take you all of a few min. So save the $$.
Second and just as important...never ever get a 4x4GB set of RAM for a 1155 board when you can just as easily go with 2x8GB. That's for a few reasons. First off you leave yourself the ability to add another 16GB RAM in the future, and second you don't have all four RAM slots full sitting side by side creating heat.
Then I would buy myself a little head room for when if and when I added that second 680. 750w will cut it but it cuts it thin. This psu down below is manufactured by Seasonic as are all XFX psu's and the mid and upper tier Corsair psu's.
I have to disagree with why_me about 2x8GBs of RAM.
Very many people have problems getting 8 GB sticks to work correctly in their computers. Anyone who gets 8 GB sticks opens themselves up to risk that they will have to do substantial amounts of troubleshooting on day 1.
When people get their computers they want to be productive soon afterwards, so for that reason I would suggest 4x 4GBs (preferably 2x CT2KIT51264BA1339) rather than 2x 8GBs of whatever brand and whatever speed.
Since a lot of people are prone to buying dodgy RAM brands in the first place, I would doubly advise against it for that reason too. I would trust a dodgy brand 4GB 1333 stick more than a dodgy brand 8GB whatever speed stick.
I would only suggest 8GB sticks for when having the maximum amount of RAM is of utmost importance, which only really happens in enterprise servers. Even then I might suggest 16 GB sticks instead if the budget allows for it.
That being said, I do 2nd the suggestion of using an XFX 850w PSU. Also 2nd the suggestion of using a 2600k OCd to 2700k levels rather than paying the extra for a 2700k.