Well, I did get a board with the 2011 chipset but went with DDR3 because it's MUCH cheaper and I'm not convinced DDR4 is much faster. Of course the new motherboards are just coming out now so we will see as there has not been any realistic benchmarking. But I could not wait (I was computerless if you don't count the other 4 PCs, and six tablets at home) and I wanted a MB that was proven stable and parts that were sure to go together. I think this machine will last at least 5 years, probably more. It's such a pleasure to draw on my tablet now; it's sooooooo fast!
I installed Windows 7 Ultimate. I used my old windows disk since my other computer died and you are allowed to transfer. I honestly did not know they were dropping support for windows 7 at the beginning of next year. I think that really sucks. I don't know what I'm going to do. We have windows 8 on another machine and I really don't like it. I love win7. I imagine I'll have to reinstall everything again, took me three days this time. Bummer. But I'm going to hold out as long as I can. Maybe Windows 9 will come out.
The ASUS Z-87 boards are really great. We used a Z-87 SAbertooth to build my son's newest machine and it's almost as fast as this. You can only notice the difference with benchmarks, not when using any application. But if I were you I'd probably get the Z-97s which just came out so that you can drop in the newer processors if you want to upgrade later. A 250G SSD should be fine. I got a 500G because I had the 250G on my prior machine and had only 30G left and wanted elbow room, but kept the 250 for cache. You'll love the GTX770. Only reason to get the 780 would be if you wanted to game at 2560x1600 (which was my new years resolution). That's what I'm running but really don't game anymore. Maybe that will change when Battlefront 3 come out though.
PCpartpicker.com is a great site. It really helped me a lot and there are some very informative and helpful people there.
Mene, don't sell yourself short. It's really not that hard to build your own. You'd be surprised. You just need half a brain; I imagine you can borrow another 1/4 from someone else.
But seriously, I'll be happy to help talk you through it if you decide to try.