Don't hold your breath waiting for me to stump up the funds! Ha haHi Jules.
Glad you are having fun with speaker positioning and support!
Given the dimensions of your room (10.5' wide and 21' long) you are probably having to contend with some serious peaks and troughs! Your experience with leaning forward in your seat to aid the perception of increased dynamics and a loss of bass impact when moving the ML's along the length of the room, all remind me of the battle I had with trying to achieve a good and uniform sound from my system in my last house (room was 11' wide and 24' long). The judicious application of tube traps and experimenting with positioning, managed to achieve something resembling a listenable sound, but it took the move to my current home (room size 18.5' wide, 22' long) to really experience what my significant investment in hifi was capable of!
BTW, current UK MRSP of a Conrad Johnson GAT 2 line stage, is £28995!
My mint condition GAT 2 is now surplus to requirements, so I'll stick it to one side, for when you're ready to pull the trigger!