Making my Town Car more luxurious

Hey I've got a '98 Town Car to work with. I'm looking for some ideas as to what I could do with it.

Here's a few things I'm thinking about, I'd like some more suggestions.

Add an amplifier, and 10" sub.

Add dual exhaust, cold air intake, and programmer.

Replace the radio with a touchscreen that will cover audio/video/navigation.

I would go with some 20's but I don't want to sacrifice ride quality.

Thanks for any suggestions.

Also one more thing I'd like to do.

I don't like the way the wood trim looks. Somebody told me that even though the wood trim looks fake, it's actually real wood. I'd like to order some rare kind of wood, and make some interior pieces myself.

What kind of wood would you recommend I look at?

I like to work with wood, so my idea is to get a rare kind (within reason for price) and make some trim pieces.