Ya, keep your money local... Keep it from going to Boulder and send it to Vail. Salamander is located in Boulder. Mongo is located in Vail. Both are great US companies.
After sitting in a few different swiftwater classes this season, it always suprizes me just how few people practice. Take your bag for a toss. Practice, practice, practice.
Spectra is more expensive than poly, and is stronger. I carry two throwbags with me when I'm running harder runs. One waist bag (spectra), and one poly bag behind the seat (just in case).