I like the idea of the bedliner on the floor. My 23 year old carpet is flatter than a pancake- I second that you want to put in a 'heavier' carpet, it should hold up longer. I saw a new Supra at the dealer last season that had an almost shag carpet in it, I thought it would probably feel good under bare feet but it might lay down pretty quickly. As a rule of thumb- the higher the weight(oz.) the nicer it will look in the long run.