I got a brand new pair of infinity reference 5x7s for $18 today at best buy simply couldent turn the deal down. I plan on getting a crown victoria soon which is 5x7 front and 6x9 rear. I plan on running about 600-900rms watts to the subs and need a front stage that can keep up. How would infinity referecnces with like amped 40watts going to each sound? Would these be good or should I just sell em and get something better.. really on a budjet...