Advice on Krell amplifier

I own the latest Krell Duo 300 XD and couldn’t be happier. I have owned the iconic 400 FPB and other Krell classics. This sounds the BEST. The latest series of KRELL XD amps are without question the best sounding amps on the market for the money. A thing of beauty given the relatively lower amount of power the amp consumes as a result of some brilliant software. Pure class A power has to be heard to be believed. 

I own the Krell 575  monoblocks, upgraded to XD. I can’t be happier with their new sound. Too, Krell’s customer service is amongst the best in the industry. 

I personally don't understand the use of burl wood to (match?) grass cloth wallpaper. I personally would have recommended bamboo. However, what do I know? I have only designed and built custom furniture for 40 years. I expect only a very few will understand and enjoy this post.

Some of the comments mention the older Krell Evolution line stuff (KAV 400 xi, S550i, 202, 525, 600, etc.).  These Evolution generation were a more transparent high resolution type of sound.

The new Krell stuff (Solo, Duo, XD) is the sliding-bias Class A and has a completely different sound.  It is a very smoothed over and possibly lush type of sound, which dealers can say "sound like tubes".  I disagree.  My opinion is that this is similar to a lot of the high bias bipolar Class A amps on the market (smooth, liquidy, lush).  Not bad, but a different type of sound.

The McIntosh MC312 is going to be more laid back and mild sounding (in a way) than the Krell XD, but it is going to be more neutral and natural sounding.  The Krell is likely to have more punch and impact.  But the McIntosh is very engaging even though it's mild/laid back.

There are three basic limitations implicit with all high-end class A power amps, so be certain that you're prepared to cope with the challenge that they present: (1) They're big, heavy beasts that generate a lot of heat, so the installation has to accommodate those needs. (2) Class A amps often use fans, and that noise can be intrusive unless there's enough isolation. (3) Minimizing DC offset at the amplifier output is a common problem with all solid-state class A designs. I'd prefer to see a published spec. limit on the maximum permissible DC offset. The Krell Duo 175XD on-line specs don't list any specification for that parameter, so be wary. I don't like to see any DC offset that exceeds 30mV, and 50mV would be the absolute worst case limit that I'd be willing to tolerate.