Hi, wanted to know recommendations on the best dot tank and the size tank that I should get. Initial fill at dive shop. Then would like to use my yong heng for top offs. Is there much difference between tiger shark, patriot, omega etc. What would be best? Only have direct filled airguns. Are there any other adapters etc. that I would have to buy with these tanks to fill at dive shop or at home? Thanks for your advise in advance.