I've got a Clarion VRX935VD waiting to go in. Probably more than what's needed by 99% of the people here, but I like Clarion. For my doors I'm switching to 6. 5" because of the difficulty in finding 6x9 components (MB Quart is the only one I know making a 6x9 component). I'm using factory size 5. 25" in the rear. All components, subs and amp are JL Audio.