Best Geforce cooler?

[ReNeG@dE]

I've already snpaaed off the original heatsink and slapped on an old pentium pro cooler (looks kind of like this http://2cooltek.safeshopper.com/1/5.htm but with only a 50mm fan). The fan on it is starting to crap out so I'm looking at getting either a new one (Blorb, or copper HSF) or getting a new 50mm fan.
What would you guys recommend? I have my DDR Geforce at 145/245, it CAN hit 155/355 but I have all kinds of artifacts and crashes. Thanks

 

[ReNeG@dE]

WTH? 21 people have read it, but no one replies?.... I thought overclockers were a very opinionated bunch...