Which profiling tools? profiling tools advice

Hi all,

I’m working on a MAC Book Pro (MacOSX 10.6.4) with a GeForce 9400M and CUDA 3.1

I’m looking at he profiling tools: is the included computeprof the best option?
I’ve seen the Nsight pluging for Microsoft Studio: is there anything similar for MacOSX?
Any advice or experience on other tools?