When I had Thiel's (3.6's, then 6.0's) i used an older pair of Thiel SCS's for the rears and a SCS2 for the center. The setup worked really well. Matter of fact I am still using the center and rears with my current setup. You can find the SCS's really cheap if you look around and the SCS2 like Mezmo said for around 5-600$.
