I believe that no difference can be heard at all between Anthem STR integrated and separated, even when compare to some Mcintosh gears (thats why I join ASR). Any well-performers should sound identical when volume match.
I'll be getting Mcintosh Mc462 in a month time, mostly because it is equal in price and performance with an Anthem STR, but Mc gears have better build quality.
And who doesnt want a Mc stack? Hehe
A Mc preamp with MEN220 + Mc452/462/601/611 stack will be an endgame choice for anyone