Worth Upgrading?

[Fors*]

You'll need to weigh the cost of the new unit with the return on your investment. I am not sure what else you could improve with the new processors you mentioned other than possibly the auto-cal programs and the DAC's. Maybe other things in the units are important to you, I'm not really sure. But owning an SC-05 with MCACC myself, I do believe that Audyssey is better than MCACC with room correction, but that is just my opinion. As far as the DAC's, not sure what those units have, but there is a liklihood that they might even use the same DAC's. This could end up being a lateral move at a cost to you. If this is the case, obviously I wouldn't do it.