Receiver

Denon A1H. Hands down.

I like the idea of separates as well. ATI reportedly builds the Monoprice Monolith amps. HSU has been suspected of being involved with the Monoprice Monolith’s subs.

I’ve been running a Marantz 7704 with a Monoprice Monolith 5-channel amp and I’ve found that separates provide better separation of effects, clarity at higher levels of volume, and greater dynamics. Both the pre and the amp have been rock solid for the past 7-8 years.

@toro3 Yes, Dr. Hsu did indeed design some of the earlier Monolith subs. ATI has a hand in the Monolith amps, but the latter is built/restricted to a price point (similar circuit design, parts quality commensurate with price). Monoprice has a history of pairing with the right technical SMEs to get them up to speed.

@deep_333 thanks for chiming in and providing confirmation. Seems like a good business move, and for what it's worth, my Monolith 5-Channel amp sounded better than the previous Sunfire Cinema Grand Architect Series - though I still love the design and weight of the Cinema Grand. 

Are there receivers that go for $10K?  Is the OP discussing 2 channels only or does he have the SFs in multichannel or Atmos?  Suspect an answer won’t be forthcoming