Putting the car on a diet

I've been thinking a lot, lately, about how I can make my cars lighter, without losing creature comfort, like seats, etc.

Focusing on front end, mostly for handling and overall weight loss, most to be had up front, anyway, for better balance.

Here is what I'm thinking, so far;

-Trunk mount battery
-Carbon fiber/ composite hood with aluminum frame glued, still hinged, lighter hood hinge springs
-aluminum k frame
-tubular A arms
-lightweight discs
-aluminum header/ grille support
-aftermarket heater
-aluminum bumper brackets
-fiberglass or aluminum bumper

Any personal exp. or info would be appreciated. I'm going with a 6 cyl.

Thought about ditching undercoat, but I don't know if the gain would be that significant. This is going to be a full interior car.