I just got my new Eberlestock X2 pack from Cabelas! It is awesome and I can't wait to fill it up this fall. I want to put a water resovoir in it and I am wondering if any of you guys have any recommendations. Eberlestock has one on their website made by Source, available in 2 & 3 liters. Camelbak also makes a good product and is well known for their quality water resovoirs. I am not sure which product to go with. Do any of you guys have a preference? or maybe I should stick to a resovoir made for the Eberlestock?