I just bought and last night installed a "Samson" rack from Mapleshade Records. 2" maple shelves, solid threaded steel rods, brass locking nuts and brass spiked feet. It's expensive, okay it's TOO expensive, but I've loved the results of their maple platform, brass cones, Isoblocks, etc. and used the proceeds of selling an amp to buy this rack.
WOW!
I'd say the system sounds about 15% better somehow! This thing is so solid and so beautiful! I'm REALLY looking forward to a weekend of heavy listening.