My big purchase in Paducah last year, was the Martelli cutter, mat, and ruler. They are expensive, but so much better quality than the ones that I had. The mat doesn't warp. I have seen them roll it and then stand on it. Today I heard the guy doing a demonstration on the mat say that you could iron on it and it wouldn't hurt. It can be put outside on concrete if you ever needed to flatten it.
The cutter and ruler are great. Buy the cutter. You will love it.
See if you can find a video on how to use it, because you stand to the side to cut and you have to hold your hand correctly.
We are in Paducah this week and having a ball. It is a little different with the vendors being outside in the Pavillion. It looks like a big white bubble. Some vendors are still in the convention center, but the hotel is closed, so no one is there.