Haven't tested the Thermaltake CL-P0257 but the Zalman CNPS9700 NT is by far the best CPU cooler I've tried so I can highly recommend that one.
But you should make sure that it fits inside your case first since it's pretty large..
My review of it here:
Zalman CNPS9700 NT CPU Cooler Review
I've read before that you should go much higher than 60C-65C on the FX-60 on load over time, but that shouldn't be a problem at all with the Zalman CNPS9700, even at low fan speeds..