I don't know about subtlety, but as far as outstanding, musical products that get your toes tapping and bring you closer to the music: I'd agree with you on the integrity of Quicksilver products and Mike Sanders. I've enjoyed several of his products over the years including the SET amps in my main system. I'd add George Wright to your list, his products go straight to the heart of the music with no frills or bells and whistles and blue LED's. Terry Cain if you're talking speakers, and Josh Stippich of Electornluv (amazing stuff - nothing like it anywhere in the world - subtlety need not apply here). Portal Panache is a very musical integrated with PRAT to write home about and at a bargain price. Those are just a few, and I'm sure there are more.
Marco
Marco