Hi everyone! I am currently searching for a very heavy duty proof, rugged and good hydration system. My friends all introduced me to CamelBak. I have looked at the website and thought ThermoBak 3L was good for me. Then I looked at BlackHawk HydraStorm Tempest II 100oz Pack(http://www.blackhawk.com/product_det...uct_id=4242&d=) . They look similar! So can anyone tell me which is better, a hydration system by Camelbak or a similar one by BlackHawk?