Hey all - thought I would reply here to say thanks for all the inputs. I've since done a couple things that have helped
I added a ML Dynamo 1000w wireless sub, which helped a ton. I also got the Ohm Walsh 4s maintained by John Strohbeen (RIP) at Ohm last spring. The system sounds pretty amazing with most music!
Last week I added a Sony PS-X555ES turntable, and I'm so impressed with it, I'm listening to a ton of old vinyl. The linear arm is amazing at digging out quality sound from old and new pressings.
The Revels remain amazing speakers but I will have to sell them to fund next steps - upgrade the center channel and get a quality, high-current power amp to complement the Denon and really drive the Ohms - they could use more power based on what I've learned online.
Thanks again for the advice
