Currently have new infinty reference series speekers for my 05 ram. I have the coax 5 1/4 for the back, coax 3 1/2 for the dash and the 6 1/2 components for the front doors. I havent installed them yet as I was just going to replace the speekers. Now I am wondering about maybe selling the door speakers and buying mb quart speakers and keeping the reference coax speakers for the dash. I was reading where the most expense should be in the speakers and since I have plans for nice subs, I am wondering if I should go fo some really nice MB quarts. I was thinking the coax speakers but then I was reading about the Q series components. I am after really awesome sound quality. Any opinions?