latest test I have seen:
http://benchmarkreviews.com/index.php?option=com_content&task=view&id=492&Itemid=62&limit=1&limitstart=4
Intel-LGA1366 CPU Cooler Thermal Difference Advantage
ProlimaTech Megahalems 24.29°C over ambient -4°C
Thermalright Venomous-X 24.47°C over ambient -4°C
Scythe Mugen-2 SCMG-2000 26.03°C over ambient -3°C
Cogage Arrow 26.53°C over ambient -3°C
Titan FENRIR TTC-NK85TZ 27.92°C over ambient -1°C
Zalman CNPS10X-Performa 28.08°C over ambient -1°C
Coolink Corator-DS 28.38°C over ambient -1°C
Cogage TRUE Spirit 28.39°C over ambient -1°C
Noctual NH-D14 (2x 140) 29.10°C over ambient
ProlimaTech Armageddon 29.26°C over ambient
Thermalright Ultra-120 eXtreme 29.40°C over ambient
CyberPowerPC XtremeGear HP-1216B 29.42°C over ambient
3R-System IceAge Prima Boss-II IA-120B2 29.46°C over ambient
Tuniq Tower-120 Extreme 29.52°C over ambient
Intel DBX-B ATS (Performance) 29.65°C over ambient
Xigmatek Balder SD1283 CAC-SXHH3-U06 30.00°C over ambient +1°C
Xigmatek Thor's Hammer S126384 30.76°C over ambient +1°C
Noctua NH-U12P 31.68°C over ambient +2°C
Thermaltake Contac-29 CLP0568 32.60°C over ambient +3°C
Antec 1200 - Get the best PSU buy around for just $70 more
http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.359977
As for the RAM you have selected, those heat spreaders are perty tall and may interfere with the mega. I haven't checked compatibility but your gonna want something more along these lines.
http://www.newegg.com/Product/Product.aspx?Item=N82E16820227362