My 2¢:
My favorite class D amps are boutiques made by Reiner Amplification. They are hybrids with all-tube hand-wired front ends. Not sure if it's the preamp or something else, but they have more 'heft' (or something) than other Class D amps I've tried. I own his original, the Studio 1200 (yes, 1200W), and his second iteration, the VHF700 (700W, and his ratings are honest). He then came out with a third iteration, the Saturn V, which I think is the best of the bunch, but Reiner amps are expensive, and the two I own sound plenty great enough, so I couldn't justify a third. Note: he's a one-man shop and currently on pause for personal reasons, including moving to a different state, but he plans to resume gear production. If you don't mind spending a little more, keep an eye out. I don't think he has a website, but there's a Reiner megathread here.
I've also owned a number of non-boutique Class D amps. An early favorite was the Aguilar TH500. I liked it, but the Gain and Drive knobs were non-intuitive to me so I never fell in love. Next was the Mesa Subway D800+. Really liked that, amazing features and performance for the price, but it was squeaky clean so I sold that and got the Darkglass 900v2 because of the onboard distortion modules (two different flavors). Darkglass has a rep for being modern metal only, but that's unfair: I've dialed in OD tones that pleased the fussiest traditionalists. Note: I can dirty up any amp with the overdrive pedals I own, but sometimes play gigs where I don't have time or room to set 'em up, so I like to carry an amp with onboard OD.