i have a TWist Dynamics roof. Its great quality but its not the best looking one imo. I think the best looking roof is the one from polaris itself!
I feel the Slingshade is too curvy for the Slingshot's other wise angular lines and feel my TD Top is a good match for the Slingshot. Of course, I also feel finding a top that one likes is a very subjective, personal decision. While I like most of the tops for the Slingshot, a couple of them strike me as lawsuits waiting to happen in that they look like they might decapitate a pedestrian in a collision. I'm sure other folks can look at those same tops w/o seeing anything dangerous about them.