I'm looking for suggestions on which of the two would be better sounding .Let me tell you what I have Sony 60XBR1,on BDI 77inch stand,Onkyo TXDS787 reciever,Velodyne CHT-15 subwoofer,Polk RT55i fronts,polk center ,AM5 II 's Bose surrond and two Bose 151 back surrounds.I watch alot of dvd's and sporting events in HD.Which of the two Aperions towers is better for me.Can I use the base from the sub and the 533PT's would this be practical or would the 633T's be what I need.By the way my set ups in my basement so I have plenty room.The polks is what I'll be replacing front,center speakers.