Just getting sarted in surround so I'm recycling my old stereo gear. I've been buying DVD's of live concerts and so far stereo is all I get untill I buy some more speakers. The 2 I have are vintage VOTT: big, ugly, difficult to find 2 or 3 more. How heavily weighted are 5.1 soundtracks in general. I mean do all 5 speakers have to be able to produce the same sound pressure or is it a good idea to to spend on the fronts and save on the rears?