I've been lucky, I know that much. The PC I'm typing this on is one of 2 home theater boxes we run. It's an older i7 820 I believe with one of the first 5770s, and it hasn't been switched off in 4 years now, and that's after over a year of hard gaming when the 5770 was the "king". It only gets rebooted by Windows upgrades and the infrequent lighting storm. The other one has been on since 2008. I've probably cursed myself saying this.
I agree that the OP has a good build. Again, I hope he can wait just a few days to see if the $ comes down, like I said, there were huge drops on many 780ti cards, it trended on social media briefly even (try not to laugh) which is how I first heard of it. If that drop corresponds to the 770 card, which is already less than 100$ for several decent eVGA models from the 760 chosen, and say gets to within 50$ or even less for the 1000$ budget, this is where to strike IMO so far as getting more bang/$. The 770 o/c so well, and will easily run 780 numbers from most manufacturers out there. That will help carry this system build forward a fair bit longer so far as longevity IMO.
Building/hardware is so much fun. Skuzzy, how has your system you built stood up? It was a 7950 GPU if IRC? I remember because I was building my 3820 680sli system at the same time, and almost went with two 7950 in xfire as the 7950 at the time was easily the best bang/$ around performance wise.