Good to have you 'round these parts. To my knowledge they have not yet put out a Classik with a subwoofer out. I suspect that if you're sticking with the Linn line that you have to move up to the Chakra(C5100?) in oreder to get sub outs. But, that sort of defeats the purpose as it is not a one component system.
Didn't LINN put out a Classik version with surround sound? I think so, becaus the price on the 2 channel dropped at the same time. It would seem the HT version would have to have sub out. If you aren't interested in HT that would be a lot just to gain a sub though.