well my antec900 has all noctua fans and on my norwand cpu cooler it has 2 noctua fans,ive had sharkoon,xigmatek,enermax fans but i now swear by noctua
Heres another vote for the NF-P12. High pressure and quite operation make it a winner for heatsink cooling in my book. And the 6 year warrenty doesn't hurt either.
Get a SE 2000. Great fans. I have a few of them in my set up. Fairly quiet, and push plenty of air. But yeah, deffo the noctua ahead of the 1000rpm version