Nice. I've heard of Ardour, but never tried it before. I probably should check it out. All the more since I'm now OS X myself as well.
However, I'm currently doing the mastering on the old tower machine with.... dare I say: Vista -_- (i got it for real cheap/bargain... around 250, but really spec'd out).
I'm running Wavelab and this VST bundle to which I forget the name of. Found it off a torrent so. :p and I got a pair of HS80 Yamaha monitors running via a MOTU 828MKII.
Although it's a bit complicated at the moment, since I'm currently mastering with some Sony old headphones (which is not recommended at all, of course. A big no-no.) and having to then transfer it to the mac, which is the machine hooked up to the 828/HS80s and then finally listening to it once more to see if the tracks sound more or less "ok".... it's a mess to say the least. haha. Space is kinda tight at the moment and I work with whatever I can at the time.
Probably an Ardour set up would probably save me the headaches and would ultimately prove to be more efficient for me, but I'm quite comfortable with Wavelab at the moment... and unfortunately they haven't release the OS X version yet.... and I don't want launch bootcamp to run just one piece of software.
Gonna check out those headphones, I've heard good thing about them.
Anyway, thx for the reply, was curious.