I'm expecting my Alpha Pal8150 any day now. It's probably the second best performing heatsink after the Thermalright. I think the Zalman is good, and quiet if you don't overclock, and have really good airflow in your case, but doesn't perform quite as well as the two above mentioned solutions.
on a side note, if you're just looking for basic cooling that is cheap, try to get your hands on a stock cooler, or a Thermaltake Venus 7+ or 8+ (not the silent boost). I bought the Venus 7+ thinking that it will perform better than the stock cooler, since it's all copper, but it turned out to yield about the same temps...maybe a degree or two cooler. If you're interested in buying one cheap...let me know. I'll probably sell ya mine for like $15 shipped after my alpha gets here.
