Anthem uses audiophile grade parts and would do your Linn a service, plus it is reported at having a nice room correction. Seems like a wonderful choice for your room. Do you cross your sub over below 60 hz as that will help with the lows directionality?
I'm a big fan of Linn having owned their Klout amp, one of the best I've owned. And as I understand the 5125 is its equal. I've never tried the active mode. I'll be back someday.
Needless to say I'm very impressed with your system.
