I would say any of the Intel kits. Wich? Just depending on how much you are willing to spend? Both alternatives will work well.
Btw. CoolerMaster HAF is the best choise for a midtower. Great cooling thanks to the 200 mm fans and silent operation.
My other suggestion is to go for Windows 7 64 bit instead.
Easier to work with and less of a resource hog.
If you want a good and silent but pretty cheap cpu cooler? Then this is a winner: http://www.newegg.com/Product/Produc...82E16835103099
install the cpu + any cooler before you mount the motherboard into the case. Expect slightly higher temperatures at the beginning, before the thermal paste on the cooler have settled. Takes about a week or 2.
Get an antistatic wristlet! Static electrisity, can harm the hardware.