For the price, I'd go with the Z11 http://www.newegg.com/Product/Product.aspx?Item=N82E16811235034&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&AID=10446076&PID=3938566&SID=
With the rebate it's way cheaper, and the cooling system really isn't that much better on the Cooler Master. You can always switch out fans and that stuff later on anyway. Also the fan size isn't as important as the fan RPM. And I don't know what RPM the Zalman's are at, the Cooler Master isn't very fast (1000 and 12000 respectively).
So I'd go with the Z11, just my 2 cents.