From what I've read a lot of heatsinks will require new retention-clips. Iirc Noctua have stated they will offer free mouning-kits to those who own one of their recent coolers.

A guy on overclock.net has got some of the new 7k1000d's already and have run some quick benches, and I've ordered a couple hoping they will be as quiet as they are fast.

Graphs and numbers here: http://www.overclock.net/hard-drives-st ... st15310588