[jddrews]

Yes.

I bought a new iMac that came with 10.4.10. Unfortunately, I don't think there is a way to downgrade your OS.

PT 7.3 ran okay. Some people had no problems with it, but it was pretty buggy for me... lot's of random crashes.

However, 7.4 is running like a dream. Once you get your Mbox, you should install 7.3 and give it a shot, but definitely look into upgrading to 7.4.

We 10.4.10'ers are kind of in a dead zone. I'm waiting for PT to become Leopard compatible and then I'm going to upgrade my OS and PT and start fresh. In the mean time, you'll have plenty of productivity with 7.4.

There are a few threads that cover this that'll have more info as well.

Enjoy the Mac!