Hi Guy's, I'm trying to get some clarity here before I buy the rest of my speakers. I have a center that has the same size drivers (4.5) as the left and the right. The salesman is trying to get me to get a left and a right with drivers that are 5.25 inches and to use the 4.5" for surround. These are all from the same speaker line (Def Tech Mythos) but I thought I read that it is better to have all of the speakers or at least the drivers match in size. Can someone educate me on this subject? I have the Mythos 3 and 4's right now and am waiting to hear from you guys before I decide on the other 4 speakers.