You're definitely not stuck with the Suzuki bags. Which ones you get simply depends on your tastes.
I have the Willie & Max Slant saddlebags. Others here have the Willie & Max Compact Slant bags; the compacts fit better and look better, but the regular slant bags fit, and they can carry more stuff, so I like them. (Bought a small cooler yesterday; now I can carry a couple of cold Gatorades in my saddlebags, which makes riding in 95+ degree heat a lot more tolerable.)
I think it's Paladin that has the Leatherlykes...(?) Those are nice too.
And yeah, the saddlebag supports are important.