FWIW, I looked at getting a cat-back kit for my Ranger when the joint fell apart on my exhaust right after the cat. After pricing out kits through several sources, I decided I wasn't sure I wanted to go that route.
After talking with the local exhaust shop, I found I could get 2.5" stainless bent up and order a 40 series Flowmaster (I have one on my choptop and it sounds pretty decent) for considerably less than I could buy a cat-back kit from anywhere. I was just going to buy the pipe through the shop and have them bend it up, then order a muffler with 2.5" openings on each end in the right configuration via Summit Racing and put it all together myself to save a few pennies.