true, but by the time you need to upgrade your machine to a new one, you would probably want to get a hi-def SDI card anyways ( assuming you dont have one now) and SATA cards are really not that expensive.

Besides, who knows when you will really need to upgrade to new machines? It is still not known what kind of performance increases these will give you. The increase might not be very noticeable in using catalyst for a normal show. I'm sure once you start looking at high def, this will be a big increase, and by the time you need to go high-def, you will probably need a whole new machine anyways, then you can keep your current setup for doing standard def.

Jason