USA Kilts are great. You can't beat a USA casual kilt for the quality and price. They are made to measure so you don't have to worry about the it being too long or short off the rack. I am a short guy so it's hard to get anything off the rack because they're usually too long.
I have a casual and a semi traditional. Like others are saying and what Rocky told me when I got my first kilt from him, it's easier to dress down a nicer kilt than it is to dress up a more casual one.