I own a Krell k 300 and it shocking sounds like tubes. My Pass 250, and Hegel 390.
i have 3 other intergrated, and the Krell was the last one I’ve purchased. It is shockingly good. So,enow the Krell is warm but has very good detail, retrival. Of course there is the legendary Krell bass.They say class D has a tube sound, but I have no experience. Have you thought of hybrids? I have a McIntosh 352, but I would advise to listen before making that purchase.its a 200watt hybrid.