differences between HPA tanks

[meloco14]

Are there any major differences I should know about between tanks? I am mostly considering crossfire, java, pure energy, and bulldog tanks. Are there any differences that warrant the price differences? Or should I just get whichever one I find cheapest. I want to get a 68/4500
Also, do these tanks come with on/off valves?
thanks

[TheTramp]

The only tanks that come with on/off valves are nice adjustable systems like the Flatline or the Max-Flo. As far as screw-in tanks go, they are prrety much the same (some might argue this however). I sugest Crossfire tanks as I have always had good luck with them. The 68/4500 is a good size as is the 68/4500 stub.

[Bulldog]

Everything he said, and the only thing I would add is that you can buy an on/off ASA to use with a screw in. It's a nice option when you don't have three or four hundred to go for the adjustable. At least in the 4500 range.