That's a great question, given the fact I haven't owned Klipsch, JTR or the Seatons I probably am not the best person to ask.
The only thing I can say is that I would use the T1s w/o the Klipsch center and run it in phantom mode as I don't believe it would blend well. It is not as significant an issue with the surrounds. You already have two solid subwoofers, so maybe the T1s are not the way to go.