NZXT just released a heat sink and from the reviews it seems a good, quiet cooler:
http://www.overclockers.com/nzxt-havik-140-heatsink-review/
http://www.tweaktown.com/reviews/4127/nzxt_havik_140_cpu_cooler_review/index6.html
http://www.overclockers.com/nzxt-havik-140-heatsink-review/
http://www.tweaktown.com/reviews/4127/nzxt_havik_140_cpu_cooler_review/index6.html