I've had Mcintosh separates (MC452/C2600) for few years and agree with everyone above. MAC is darker sounding with rolled off highs. It does have an amazing midrange and bass. I'm a classical guy and it wasn't enough detail in piano, totally rolled off, and other solo instruments sounded veiled.
If you're going for Luxman, go for their Class A amps and nothing less. If you get anything less you may regret it and will be tempted to upgrade later. The 590 and 595 in particular were my favorite. These come as close to tube sound as possible without having tubes. Ultimately, I ended up with a powerful SET to drive my speakers. SET is the end game in hi end music. Period.