Last weekend I had a chance to audition several models of Pi Speakers, including 3pi and 4pi models. I also heard 2pi and 2pi tower speakers.
These are easily the best speakers I have ever heard. I ordered 4pi kits on the spot, with 3pi subs (to be used flanking) and 2pi surrounds.
I am working with a wood shop right now to fascilitate cabinet construction. I was initially planning on bubinga (because Wayne's bubinga 3pi's are truly droolworthy). Might go with mahogany or walnut instead though.