Matthias: I recently pgraded to HD 2 from a MIX 3 system. Honestly, as I mix in 24 bit 44.1 ther eisn't any big difference. My OS 9 system was much more stable. As I had to buy an intel mac I had to upgrade also and LOGIC doesnt even work with TDM on that platform as of yet which was a huge issue with me. You have a great system, use it for all its worth.