I'm buying my third Teeny line soon. The balance of the Teeny series T-200, 300 400, 500 are great. For the rivers you mentioned, the Teeny's shoot a long distance. They cost ($52) but they're worth it, and they do get down. They have 35' of sink tip and they do get hung up if its rocky on bottom, so consider that depending where/what type of water you cover. www.teeny-nymph.com