Is X99 able to take full advantage of ECC memory? Because I'm thinking, if I go Skylake then I'll have to spend an extra $40 for non-registered RAM and another $40~ for an ssd (unless I can find a decent used ssd for the boot device). Alternatively, I can put that $80~ towards a Xeon E5 + X99 board. Specifically this one:
http://www.asrock.com/mb/Intel/X99M Extreme4/
"supports Quad Channel DDR4 3000+(OC), Supports ECC*, RDIMM Memory (*ECC is supported with Intel® Xeon® processors)"
E5-2603v3 + x99 board + 16gb registered ECC +8800GT I have lying around for initial setup - $500~
vs.
i3-6100 + X11SSM-F-O + 16gb unbuffered ECC + SSD - $510~
The downside to the X99 platform that I see is that it's clocked significantly lower (which may or may not be an issue? if my main use is Plex).