I owned the ST-4 for a short while. I'd say they are very neutral and detailed balanced a little heavy on the low end. I guess a bit layed back overall. I compared them to the similarly priced B&Ws (604s I think) and liked them better. I think the B&Ws were bright and a little annoying. It's all in what you like I guess. I have a bright room and was concerned with that.
I also found set-up to be pretty tough, hard to place. Anyway, lots of amazing speakers out there, have fun. One company I've been made aware of lately is carolina audio. Supposed to be fantastic stuff. www.carolinaaudio.com.
Enjoy, best of luck!