So far, I have put the Thiels on the spikes provided by the manufacturer, and put the spikes on quarters. The speakers are well clear of back and side walls (3 or 4 feet from the back wall and 3 or 4 feet from the sidewalls). They are about 6 feet apart, slightly toed-in and 10 feet from the listening position.
The bass has tightened a bit, but I could do with a bit more. I'm looking for a supplier in my area, who will cut me a couple of stone/granite/marble slabs to my specs, so I can play with that.
Any speaker cable recommendations anyone? I'm currently using thick, multi-strand solid core Audioquest cable, with spade lugs added by the dealer.