I'm honored to have the opporunity to help break in my dealer's brand-spanking-new KW SACD this weekend --- it's changing sonically almost by the hour, becoming better and better.... The sound is absolutely stunning already --- I've never heard as much detail, dynamic range, or as deep a soundstage as this player produces, and I've done a large amount of auditioning of the high-end players. It also pulls more texture and detail out of the bass nether regions than I've heard before. It really does almost sound like vinyl, especially on SACD. The most amazing part is that it makes CDs sound SO good --- they're absolutely NOT digital-sounding (unless, of course, it's a terrible recording or mastering).
As far as the tube or solid-state output stages, so far I like the tube output stage better. Music just has more body through it, especially vocals. It perhaps sacrifices the absolute minutest bit of detail, but just overall sounds better than the solid-state output.
Anyway, I've just got a couple comments for those others auditioning one/considering one.... I have 2 beefs with the unit:
(1) [BIG BEEF] The drive mechanism is so dang noisy that in quiet passages, I can hear it quite clearly from my listening position (which is about 7 feet away from the KW in one of my 2 systems). With all the ventilation holes in the top, the unit just makes a lot of noise.
(2) [SMALL BEEF] It takes about 25 seconds to load up and play a CD, all the while making all these nasty-sounding noises that are clearly audible per my point (1). It takes only about 10 - 15 seconds to load an SACD. My best guess is that the player must try to recognize discs as SACDs first, fail a few times, then read them as CDs.
Oh, and just so you know, be careful moving this thing around -- it weighs about 45 pounds (oof!) and is fricking huge! (19 inches wide, 18 inches deep, almost 7 inches high). And please note that you probably won't want a rack shelf right near the top of this thing --- a tremendous amount of heat (for a CD player) comes out of the ventilation holes on the top....
Overall, it's an outstanding player. I'll be serious time comparing it to the other player I've got in my house at the moment (a Copland CDA 822, which is also a stunning player for CDs) today. If anything interesting happens, I'll write again....