The TNF Wasatch that you picked out would also be a good choice. It earned an honest 41F Lower Limit rating for "the standard man" in independent European tests conducted on copper manikins. A poster over at the Backpacker gear forums is putting together a web page collecting these independent (EN 13537) ratings. You can find it here. The number for Lower Limit is the one in the yellow zone.

The Marmot Trestles 30 bag looks like it's closest to the Wave 11, sold in Europe. The size long weighs 3 lb., 5 oz. and gets a EN 13537 Lower Limit rating of 32F.

There's no objective information on the Slumberjack bag that I know of but Slumberjack generally has a reputation for very optimistic temperature ratings.