The reason for the 6x9's is they're stock in my ride beside the rear passengers. I've recently purchased a set of Infinity reference 6x8's, 6.5's, and 4's as a package deal but unfortunately can't use the 6x8's. I've checked out pioneer, phoenix gold, jl audio, almani, cadence, and kenwood. I do plan on running a 10" sub so no real need for over kill but something with superior sound quality.