Are you running 803D's now?
I've never heard 803D's in my system but am very satisfied with my 802D's. I have a pair of Tekton 4-10 bass towers running with them. The amp is a "Magnus Audio MA-400" (500 watts at 4 ohms / 250 at 8ohms). It's great top to bottom with a stage that's detailed, as well as deep & wide.