40'Tudor.......You sell for Douglass correct? I have used your Columbia vinyl, i was very happy with it.
And 40'Tudor is right, there are many different qualities of Leather, Vinyl, Carpet and so on. Stay on the high end of everything, and you will have your quality. Perfect example, go to Office Depot and feel the "Genuine Leather" on a $79 office chair and go to a furniture store and feel the leather on a $1500 chair. Its a night and day different. But furniture leather generally isnt used for automotive use. A different dye process is used...
A good quality leather will last you for years and years. A good quality vinyl will do the same. UltraLeather is very soft leather alternative, and it is pretty durable. UltraSuede is also very durable, but not UV resistant. As far as carpet, Wilton 1 wool is a very durable carpet, and very good looking. I could go on for ever about different materials and what I have tried and what I like and what I dont like, and why I dont like each of them. Or what works well for different situations....
Remember, you need to take care of your materials like you take care of your paint job. You wax your car, you should use a leather conditioner for your interior...