I went with the 5820k cpu, no real need to go higher than that and you can get it for 299 and Microcenter. The 28 lane vs 40 lane is a moot point even for sli, the performance gains 16 vs 8 is unnoticeable.
For the motherboard I got the Asus x99 deluxe, but a lot of people just went with the regular Asus x99, depends on the features you want. Newegg had the better deal again here.
For ram, really depends, I wanted to overclock and heard G.Skill ram was a beast so went with 32 gigs @2400mhz but 2133 will service you just fine. Newegg had better prices than amazon here!
Cooling I went with Corsair H110, great solution that keeps everything cool and nice!
Graphics go with gtx 970, I have twin 290x but I already had one so figured I would hold for a killer upgrade once we get some better video cards with 6 gigs of ram on reference boards. The 980gtx seems sweet, but I would wait before spending 500+, more powerful solutions coming next year with more ram.
Always check this site :
http://pcpartpicker.com/search/?cc=us&q=Samsung+UN65HU8700
Check the best price from numerous vendors.