I absolutely love JM Labs with McIntosh. I find they are very synergistic together. Check out my system page for more info on my setup. However the three brands you have mentioned there are the three I recommend with McIntosh.
Speakers For McIntosh MC352
I am currently looking at upgrading my speakers (Mirage M1's) and would like to know what other mac owners are using and what they think. I am looking at JM Lab, B&W and thiel but am open to other suggestions as well. By the way has anyone heard the McIntosh MCD201 cd player yet? I might pick one of these up instead of the speakers(Undecided) but am waiting for my local McIntosh dealer to get one in.