I started with an 808d it was ok but the barreries were too weak and the carto's were too expensive and refilling the cartos were not something I was into. I moved to a ego which was ok, the battery was still just a touch weak and I hated the charger so I quickly switched to a little cheapy AA 3.7v box mod and after switching to xl clearomizers juice capacity was almost there just needed a little more. I'm finally considering switching to a silverbullet or roughstack and going after an eztank or dct tank. Do you think thats the way to go? I've heard horror stories about some of the tank systems, but I really hate refilling and I want a battery that will truely last all day. So what do you think?