Well here is what I think would be a better choice, since you don't plan to do much gaming. 1gb is not really needed for the 460, the 768mb version will do just fine. This is the best 460 from the 768mb department.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814121390&Tpk=DirectCu%20460%20768mb
Review: http://www.legitreviews.com/article/1369/17/
If you really stuck on 1gb of VRAM even though you don't need it. The best one is the MSI 460 1gb Hawk. Great cooler, keeps temps low. But I really don't think you need it since it's after all not going to be any different from the 768mb model. Your paying 60$ more for something your not going to utilize (meaning your not going to be gaming with this.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814127518&cm_re=460_hawk-_-14-127-518-_-Product
Review:
http://www.guru3d.com/article/msi-geforce-gtx-460-hawk-review/21
Bottom line: I suggest just going with the DirectCu, save 60$ and spend it on the CPU upgrade down the line. The DirectCu to Hawk, if your not gaming there is no difference. Both coolers are great and quiet. The DCU will be your best bet.
Amazon prices since your PM:
DirectCu 460 768mb:
http://www.amazon.com/gp/offer-listing/B003V8AS00/ref=dp_olp_new?ie=UTF8&qid=1290940474&sr=8-1&condition=new
MSI Hawk 460 1gb:
http://www.amazon.com/MSI-Geforce-460GTX-PCI-Express-Graphics/dp/B00446CJDM/ref=sr_1_1?ie=UTF8&s=electronics&qid=1290940528&sr=1-1
Amazon: If you go with the Hawk, pick it up at Amazon, It's the same price but you don't have to pay taxes, or at least I think. If you pick up the DCU go with Newegg, the taxes need to be paid but it's cheaper than going with Amazon, the 150$ is after an MIR, why do that when Newegg's price is at 150$ with a 15$ MIR...