I attended the BTS show in NJ recently and also asked the vendors many questions about their product. Waterproof Dry Suits are made in China (or Asia). The Ursuit is made in Sweden and the Santi suits are made in Poland. Santi's support is US based in Florida. Halcyon now has the support and repair facilities. Ursuit's booth was right next to Dive Right In so DRI could be providing domestic support. Because DUI is located in San Diego, the west coast stores heavily support DUI due to the proximity of their location in San Diego.
I was in High Springs, FL recently, tried on a Santi BZ200 undersuit and made the purchase. The inseam of the suit was a few inches too long so the person I was dealing with took the suit and shortened the legs for me. I will most likely purchase a Santi based on reviews, and east coast support.