I bought this converter kit (3 drop lights).
https://www.amazon.com/gp/product/B0...e?ie=UTF8&th=1
I wanted a flat surface. They have the molded medallions if you want, but I wanted a plain, white, flat surface. These are a little pricey, but I got exactly what I wanted.
One light can was on the slopped part of the ceiling, but this kit worked great. I bought my pendant lights from Lowes. I bought a plain light, swapped the included globe with another style globe we liked better, and purchased hollow rods (from another light kit) for the drop wires (didn't like just the plain wire). I had to cut one rod for the slopped ceiling to match length and rethread it, but everything looks great. We use them every day.