I love the corsair series. I have the 100i and my temps have not gone above 71c with my 3930k at 4.7ghz.
I think I am going to play around with overclock when this is done. What ram speed are you running?
I have found my 3930k won't oc to 4.8ghz with my memory at 2133.
Edit: Sort of double posted. My bad!
I'm running my RAM @ 2133Mhz 10-11-11-31 w/ 1.6V right now, IIRC. It's only a 1866 Mhz kit, but I have tested it up to 2400mhz 11-12-12-31 with 1.66V and it passed three runs of memtest x86+.
I don't mind the corsair coolers at all, using a h100 on my 3770k gaming, and that keeps temps under 60C in the case (Arc Midi). I only have the 3770k @ 4.5ghz though.