i hear you chris, im not a big fan of the stock rims. Too big and flash for my liking. I think ill go to 19's and torque thrust old skool style rims. Headers are a must and the side exhausts are the only way to go.
I hear the diablo handheld tuner works well on the hemi from the chargerforums.
Im not a fan of supercharged motors, feels like fake horsepower to me. Thats what really lets down the GT500 and the ford GT to me. Small blocks with blowers to make the big power numbers. Dodge always have the right idea, you want big power? Use a big block in the first place.