Recently bought two sets of legs off Amazon for my DQ-10's. One set is 10" tall and the other is 8" tall. The 10" legs are a matte black finish and made of welded steel (see attached photo). I would want to paint them a dark walnut brown to match the rails. The wooden legs are 8" and a lighter brown than the walnut rails (could possibly stain them darker). The steel legs are? slimmer with a diameter of just over 1" at the widest part (at mounting plate); the wooden ones are closer to 2" in diameter where they attach to the metal mounting plate.
Is there a preferred height? I'm having trouble thinking such a small difference matters. It appears based on the files out here the stands raise the bottom surface 11.4 inches from the floor.
FWIW the wife likes the wood ones (they do seem to match the mid-century modern style of the 10's more than the plain steel) so I'd encounter a bit less resistance putting these in any room I choose.