@lanx0003. My first class D amp were custom built Hypex NCore NC400 bridged amplifiers. I had them for a short tine and replaced them with Mola Mola NC1200 mono blocks. I was disappointed with the sound quality and sold them. As I stated above, they sounded very good at first but the more I listened, the less I liked them.
This was several years ago and I have no other experience with class d amps.
I currently own the Musical Fidelity M-6Si integrated amp. I am VERY surprised it sounds this good. I am very happy with my decision. The M6si offers excellent performance, facilities, and power. As per the Musical Fidelity web site “Internally, the M6si is configured as 2 independent monobloc power amps with a separate preamp. It is, in fact, a preamp with 2 monobloc power amps that just happen to share the same casework. The M6si has 220wpc. It has very low distortion, outstanding noise ratio and extremely flat frequency response”.