sooo tell me if this is stupid or not. I have a boston acoustics MCS130 5.1 setup with an onkyo 606, and I was wondering if it's possible to convert my fronts into surrounds, make my current surrounds rears, and buy new fronts to create a 7.1 setup. If it's possible, does it make sense to do so? Would I be better off just buying new rears? My reason for asking is that if I upgrade, I'd like to get the most bang for my buck, and my ignorant assumption is that I'd get more out of my system by getting high quality fronts and moving pieces "down", instead of just getting new rears.