I too have the fpb 400cx and KCT. It is absolutely one fine system with cast cables. I snuck into the Las Vegas T.H.E. show and listned to some really expensive systems but none put my system to shame, in fact very few sounded as good. I short you are going in the right direction imho. My only advice, give your KCT good ventilation. I have the kav 280c but hope to get the kps 28c soon also.
have fun!
have fun!