Thanks for the vote. I do a lot of stuff like this and the majority don't bother to vote for the most helpful.
Normally you don't need an air cooler unless you are overclocking. However the Haswell's tend to run a bit hot and lout so an aftermarket cooler would be nice anyways.
If you are really squeezing your money, this is the best bargain there is:
http://www.newegg.com/Product/Product.aspx?Item=N82E16835103065&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=