My mom used to make all of my show clothes (she's a professional seamstress so she knows her stuff!) and made me a pair of ultra suede chaps. They looked great and were easy to clean, but if the fringe is too fine the fabric doesn't hold and they fall off!
They also bunched just as much as real suede, and back then I was only about 100# with skinny legs. I'm no big girl but now that my legs aren't stick thin I'd be willing to bet they'd bunch even worse.
I would go with the smoothies for fit and quality, though I haven't yet tried on a pair. Good luck in your search!