I have a 7.1 system consisting of a CS20 center, TSI200 for surrounds, Monitor 40 for front wides, PSW125 sub and 2 old realistic MACH 1 for the fronts. I drive these with an Onkyo 809. I want to replace the fronts with either a TSI500 or the new TSX550T. Has anybody heard the new TSX line? I want to be all polk in the HT room and sell the MACH 1's. Any help would be appreciated.