I'm quite happy with Class D, and I only ever judge an amp with my ears and not the spec sheet - I was just curious as to whether it was some new tech that was worth thinking about.
I've never thought the 500W heads were under powered, but as the 800W is only about another £60 it got me wondering about it.
I've got a Tecamp Puma 300 and a Darkglass M900 and I seem to be using the Tecamp more often and then using pedals if I want dirt. The DG does do a great clean too, but I'm wondering if I fancy a change.