OP, when you say you are looking for a "fuller sound" it reminds me of some problems I was having with my room.
In my room, I wanted more fullness. There were some drop-outs (nulls) which I was able to specify and then address using room analysis software and microphone. I then made some adjustments to speaker positioning and room contents (including bookshelves and some room treatments). Changes to those factors were substantial and they allowed me to go ahead and compare gear confident that it was the gear which was now the thing-to-be-changed (or not).
Have you got your room as good as you can and have you measured it, would be my question.