The vast majority of my tone shaping comes from the DHA VT1 EQ on my board - I use the amp to adjust for any 'inconsistencies' in the stage sound. DI feed comes from the DHA too, so I know my feed to FOH is just the way I like it.
I tried running an old Laney power amp (bridged to 300W mono instead of 150W per side) this week instead of my usual SWR, and it still sounded great. I might start looking into a small class D power amp...