i do a lot of snorkeling and have just done my first scuba dive (loved it), i want a handheld scuba diving tank with a re-filler because i don't like having 2 giant tanks on my back and all the wires (i might get a proper system in a few years). my question is what have other people liked and what would be the cheapest. it needs a re filler as i don't want to have to buy new tanks when they run out.

something like this: http://www.leisurepro.com/Prod/SX27Y.html?&&