Ideal speaker stands?

20-28" depending on your set up
Most typical is 24".

A.M.P. is easily the best, and best looking:
Look here:
http://AudioMagicProduction.com/start.html

I would have to say ideal stand height depends on the size of the speaker. You want to have the tweeter at ear level when seated. As stated above 24" is a pretty common size. I have been using Atacoma 24 SE stands. I think they are a steal as far as stands go. If you can find them grab 'em. I found mine on the web somewhere but I can't remember where. Good luck.