George P. I hate carpet as well. But, a few things to know:
First, I've noticed that most landlords buy carpet that is light brown in color. When they do this, it doesn't matter what the carpet was made of as it will darken due to normal wear and tear. I've seen black areas near furniture and wondered "why is it dark there"? I later find that the tenant had a black lab or something and that's the place the dog liked to lay down. Dogs have oils that secrete onto anything the animal comes in contact with. People's bare feet do the exact same thing!
Unless you're going to go with a hard surface of some kind, any carpet will show wear and tear unless you are ready to either spend some $$ on a great, quality carpet (a Triexta fiber carpet for instance) that has superior stain resistance qualities (not stain proof), or go with the nasty, cheap sculpted carpet that you see in low end rentals all day long. You will never see stains in this carpet, but the yarn will wear out quickly.
If the carpeted areas do NOT have to all be the same carpet, look for rems. I have put high end Karastan carpets in rooms that didn't cost me very much at all.
Your best deals will not be at Lowe's or HD, but your neighborhood flooring store. If you make friends with a salesperson, he/she can alert you when a rem becomes available and you can be ahead of the game!
Good luck!