Just some insight on the center armrest extension. I have an '02 and I just recently (about 3 months ago) got the armrest extension. I had considered it when I first bought the car 7 years ago, but didn't because I didn't think I needed it. A few years ago I thought about picking one up, but I didn't want to the spend the $100+ for one. Finally, I picked one up used and I absolutely love it. I can't believe that I waited this long to get it. It makes long drives so much more comfortable because your elbow naturally falls at that exact height (at least for me at 6').
Long story short, get the armrest extension and you won't regret it.