change/add as you will, though i wouldn't spend anymore on the CPU and PSU at least. if you do decide to get a 1440p monitor, consider getting a 290 or 290X with a custom cooler for better performance at that res.
for the money; 1866, though differences are negligible over 1600, most people go with whichever is cheaper. trying get more than 1866 requires it to be OCed. you may or may not see some problems when that's the case.
as for CPU OCing; all comes down on your luck & how good of a chip you're getting. considering your budget, i guess you have a bit of room for a higher end motherboard if everything else looks fine. i wouldn't spend more than $180 but that's really up to your fancy.
I had a few questions. On the CPU cooler is that a good choice or H105 or something else? Video Card - which is better that one or the Asus Direct CU II version? Monitor - is that the best monitor for Gaming at 1440p in IPS Panel? Thanks for any advice i get
i honestly wouldn't spend THAT much on a PSU, considering you have no plans to get another card to SLI. the PSU i linked would still be more than plenty. and even if you do have a change of heart to SLI, you're really not going to need 860W 80+ Gold certified. 750W 80+ Bronze from any of the tier 2 from this list would handle it well; http://www.eggxpert.com/forums/thread/323050.aspx
not a fan of all-in-one liquid coolers like corsairs Hydro series. but i guess you got the funds for it.
on second thought i can't recommend getting an expensive motherboard if you want to include a 1440p monitor in your budget. that motherboard is far too overpriced for it to come with an 8+2 power design. consider an Asrock Z87 Extreme6 (or even the extreme4) for 10+2 power phase. at the very least, the price is worth it.
as for the monitor, dunno it's the best, but you don't exactly have a lot of affordable choices for a quality 1440p IPS monitor