Mark, the Symphonic Line gear is a great match with the Revels. I'll go through it piece by piece.
The monos are slightly warm, fast and super-dynamic. The top is sweet although not rolled off, and the bass has weight, body and texture. The manufacturer seems to disdain specs or at least doesn't worry about providing them, but a less powerful model is said to provide 120A of peak current, so it would seem they are comparable to other heavy hitters like Soulution and Gryphon in that department. Using an iPhone sound meter app to measure, I've driven the Revels to 118dB peaks at my listening seat with them before audible clipping starts (not something I do every day!).
The tube pre adds an additional touch of warmth and richness of texture, and gives a deep and tall soundstage that extends past the speakers. Players and singers are properly sized within those spaces. It is the oldest piece in the system, originally made in 1999 but stripped down to the circuit boards and rebuilt to then-current standards in 2011. To give you an idea of how important it is in the overall system sound, a year ago I put in a bad tube and cooked some stuff on the power supply board, and was without it for a month. I used the Plinius M8 pre-amp that I'd kept...and I couldn't wait for the SL pre-amp to come back. Choice of tubes can make a sizable difference in sound; the Telefunken E88CCs I'm currently using are detailed, extended and really get the imaging thing down pat, while the Mullard CV2492s give that rich Mullard midrange. The stock EH 6922 tubes it comes with don't come close to doing it justice; they are detailed and have some drive but don't give the holographic imaging and sweetness that better tubes do.
The CDP is still in that awkward teenage stage. So far it is extracting quite a bit more detail and more powerful bass from CDs than the Ayre player does. The decays are impressive, to say the least, and it carries the system dynamics even further. It also brings vocals a little more forward than the Ayre does; this would address what some say is a perceived weakness in the Salons (it's never bothered me). The power supplies are massive for a CDP, and I'm waiting for them to break in and for a wee bit of upper-mid stridency to continue to go diminish, but I can already proclaim it a winner.
In terms of comparisons, only other amp I've used on the Revels was a Plinius SB-301. That amp brought the bass in spades and was pretty dynamic too. It was a bit rolled off compared to the Symphonic Line sound, but I have to admit it sounded great when I replaced its stablemate Plinius pre-amp with the SL pre-amp, and I could have easily lived with it for a very long time if the opportunity to get the SL monos for a bargain price had not come up. The SL amps better it in soundstaging, detail, and depth - as they should for amps that go for three times as much.
I've also heard the Salons with a Mark Levinson 532, in a very damped audio store room (my listening environment is the antithesis of damped, LOL). That amp was nice and very sweet on acoustic music and small jazz combos, but I thought it too polite and lacking speed and dynamics for rock or more complex classical.