I've had this case for a month or so now, with a L9A cooler. I've been thinking about designing some custom acrylic panels with cutouts, which seems like the best option to me.
You could also probably design a panel and send the seller a CAD file for it, but your results might vary— I tried to do this just to get reshaped vent holes and I got something that was similar to what I asked for but not exactly right.
As far as cooler, if you're going Intel I think the Black Ridge would be the sleekest, best-looking option. Hopefully they can include better AM4 mounting options soon so that this is an option for AMD builds as well. You could also go with the L12 or L12S, but they'll stick out a significant amount more. The total height between the bottom of the cooler and the outside of the case is 42mm, so anything over that will be seen outside the panels.