Would a 6 and 7 channel be a better upgrade than a new sub?
Since this wasn't addressed I will throw in my two cents... I 'LOVE' the enveloping experience that 7 channel audio gives you, I currently am only running 5 channels, but I plan on upgrading to 7 (going to skip right past 6 channel and straight to 7) channels as soon as I can. However, I personally feel that bass adds even more to the experience than a 6th or 7th channel would. Since you are already running 5 channels I don't think the 6th or 7th channel would add nearly as much to your experience as a well designed, and placed sub would give you.
Again, that's just my own two cents.
