Class D amps

The digital amp company makes a really good class d amp. They have a model called the 4800a which is being discontinued and the cherry plus is also a very nice amp from this company, I think if you are considering getting a class d amp you should put them on your short list, just my opinion, Kent

There are class T(TriPath) that I personally prefer over the class D.
Being a studio tech hobbyist, got used to clinical and clean sound to evaluate a recording quality. Learned to appreciate Sunfire class T amps for these abilities of thin details, instrument separation, speed and muscle power.
Amps such as W4S have high enough impedance to be driven by any tube preamp with ease. I would though recommend to use fully balanced tube preamps.

There is a ton of info on A'gon about Class D amps.

One of my favorite topics.

I'd suggest doing a search before asking questions.