I'm looking for feedback for the use of a 5 channel system amp vs. 4ch and 2ch for sub. I'm getting ready to install my comps and I will be adding subs in a few weeks. I was wonder what the benifits of a 5 channel amp would be over a 4ch for my comps and 2ch for the subs? I have OZ matirix comps, thinking about some 2 Diamond D310D4's ?For 5ch's,I was considering a jl500\5 (which I have heard nothing but good about) or a Massive Audio 950.5(which I can't find much on). I'm not trying to break the bank so if I do 2 amps I was thinking about a Cadence TXA6004 and a TXA3004? Any pro's and cons you guys could offer would be great.