1st: it's a bottleneck and there'll be fan installment issues. 1866mhz RAM isn't needed for only gaming, only 1600mhz RAM is required.
2nd: Looks decent, recently had that build. Although I'd get an i7 as that's a bottleneck too. Either get an i7 or downgrade to 660Ti SuperClocked.
Both: Get a better PSU.