"Pantherstream"... isn't that what a panther makes after drinking too much?
I would look at the Arctic Cooling heatsinks as well. They've got a good price/performance/noise relationship.
Take a stroll through the Cooling section here and read some of those reviews. Many of the coolers there are available at prices in the same range as the speeze's.
In fact...I happen to know of several high quality heatsinks available at bargain basement prices: SPCR's Lab Clearance Sale
What CPU are you looking to cool?