well, if you're meaning pressure, there is NO better tank...hi pressure, low pressure, whatever. Theres no real significant advantage either way...
If you're meaning psi (45k vs 3k) then again, there is NO better tank.
If you're meaning size of tank, well, that one is up to you depending on how big you are. Personally I like my 45/3 (thats 45 cubic inch, 3k psi)
So, in short, whatever you can afford and is sized to fit your needs, thats what you should get.