My new gaming-only build has an i7-4790K, 16gb G.Skill Trident @ 2400mhz, ASUS Maximus VII Hero, 2 x Samsung Evo SSD raid0, and 2 x Sapphire R9 280x Toxic crossfire. I'm a pretty lousy gamer with slow reflexes
I'll keep using my 27" 2k Dell for now. I have to get the cooling sorted out in my build anyways. I'll keep my eyes peeled for a 34" widescreen though! No 4k for me; I think widescreen will ultimately give better immersion than 4k resolution will, while my crossfire setup should be able to run at a decent framerate at high quality settings in widescreen...