As has been said before, this is a good opportunity to experience an HD system and have whatever bragging rights that go with it, as long as you can afford to take the hit on power. Native systems have the edge now on that front and promise to push even further in the coming months. It seems to be a question of what marketing angle will best serve you with your particular client base. From what I understand, an HD7 rig can still keep up pretty well. Our HD3 does not, but it's on an old G4. Yes, you can still use RTAS Plug-ins. And true, if you need more than 18 channels of I/O, Native PT may not be right for you.