I built it around a month ago, and it came out to $1094.70 (after shipping before rebates), given that I also had to drive to ATL in order to come in under budget (12 hr round trip, but my friend paid for gas).
The only real problem when building was cable management. The 8 pin CPU power wasn't long enough to be routed behind the mobo, so until I get an extension it has to go straight up. I also didn't like that the HDDs had to be mounted facing towards the mobo instead of to the side, which made cable management kind of bad there. Other than that I didn't have any other major problems while building. Unfortunately the original HDD caused random BSODs, but Seagate replaced it without too much hassle (other than the $11 to ship it back).
I overclocked to 4.5ghz @ 1.208v and temps never exceeding 69C with IBT and P95. I am very happy with the performance while gaming, but I was honestly hoping for better FPS in flight sim; although I do run a lot of addons and on ultra settings so I can't complain too much. For gaming, the only one I have tried that gets less than 60FPS on ultra was Crysis 3. Overall I am very happy with the performance, especially when compared to my old 9 year old Dell XPS (which now serves exclusively as a foot stool).
I plan on adding a few things in the near future. The first of which will be a 2-3 TB HDD for storage (I can't live with just 1TB). After that I am probably going to add a SSD, though I'm not sure what size I will be getting (recommendations welcome). I am also contemplating grabbing a closed loop watercooler, but I will wait and see what kind of temps I get during the summer (it gets really hot here). Other than those if I can get the cable management to something acceptable, I will be adding a couple of lights.
That's about all I can think of for now. If anyone has any recommendations for future upgrades or for games to try out, I would appreciate it. Have a great day!