jax, I find it interesting how similar your progression has been to mine (only you're a little faster!) I had the Ayre 5-xe series as well (non-mp, as it wasn't available yet), to switch to Simaudio for a bit, then back to Ayre with the QB-9, VX-5, KX-5, and I've been eying Shunyata for a long time now (just waiting to pull the trigger basically, I do have a Talos for now).
Please let us know the differences you find between the VX-5 and MX-R20. I need to know if I should refinance my home
