Nice first - I like the tubes in your Rig. I also like Sophia Electric, Richard came and presented at one of my club's meetings - very intersting guy.
Hard to say what to change - I am not familier with the Naim or Silverlines. You can roll some tubes for fun.
Maybe throw a big thick oriental rug down over those tiles and some curtains over the window - Just call me Martha Stewart. Seriously though, just something to keep the sound from bouncing off all those hard surfaces.
Those types of things can often make more of a difference then new componants.
Enjoy,
Groove
