Well, a home theatre bypass loop is a relatively inexpensive upgrade on the BC21.1, I know a couple of people that have had it done and it works very well.
As Monk says, it depends a lot on what else is in the system, and what you are trying to accomplish musically. Having said that, I think that the Blue Circle does a lot more a lot better than the Cary. The BC21.1 is a very neutral but musical performer, and lots of fun to listen to for long periods of time.
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