Starting work on my 2991 GS. Looking for tips.

I had some questions. I have always been car-savvy, but never modifying-savvy.

Im thinking about buying a resonated exhaus tips. Will that help the car soundlouder?

Is there such thing as a glowing orange shift knob? If so where can I get one.

What are the cheapest/best internet sites to buy cold air intake systems from. (And the best internet shops PERIOD.)

And ..

What would be a good color combonation for inside of my car. The car is silver.

ANY help you offer would be great. Thanks.