Mistborn is a great place to start for Brandon Sanderson; it's what made me a fan. I think it offers a good idea of how he takes fantasy tropes and plays around with them. The audiobook I'm listening to is from
Graphic Audio, which makes audiobooks that are supposed to be like "a movie in your mind," as their motto goes. It's like Focus on the Family's Radio Theatre productions (Narnia, Screwtape, etc.), where they have different voice actors for different characters, complete soundtracks with music and sound effects, and basically everything short of actual visuals. I just finished part 1 of
The Final Empire, and so far it's been
very good. There were a few minor issues I've had with their choices (and one major gripe: They completely cut out the first sentence of the book, "Ash fell from the sky," which makes absolutely no sense!), but it's a very good production. Graphic Audio has quite a few of Sanderson's books. Unfortunately, it's a bit pricey. I lucked out and got the complete set for the first Mistborn book for my birthday. Now I have to save up to get the rest
FYI, this wouldn't be in audiobook form, but you can read the entirety of Brandon Sanderson's
Warbreaker on his website completely for free. It was an experiment on his part, to see if he could still make money by offering a whole book for free on his website. The experiment worked; it allows newcomers to get a taste of his writing, and...well, after reading it on his website, I promptly went out and bought a physical copy.