Need help about torches

I am really considering a SR-20, 200 amp, small water cooled torch.
The Everlast 205 (my dream) comes with a foot pedal, and has 2T&4T, and the gas is controlled by the welder.
So I assume I don't need a torch with a gas valve but I would like one with the 2T/4T button for working under vehicles or overhead. Or a button add-on.
Is my line of thinking on the right track?
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MARK. . . if you see this....How are the hoses (copper tubing) measured for the gas and water...I again assume metric and 'inside dia'. Again...am I close?

I meant the Multi-Process 'POWERPRP 205.

I am not sure about SR 20 torch. I am assuming it is compatible with WP 20. It sounds as if you are buying a torch body only because you are referring to the copper parts. Why not buy the whole thing where the tubing and fittings are included? The size of the tubing you will need will depend upon the torch manufacturer. The torch must have a special cable for carrying power and water as well.

Mark, I erred and purchased a #26 water cooled torch with 25' of hoses online.
This torch is so small it does not even have a back cap.
I am looking for a #20 w/c torch, a torch for which I have no trouble locating consumables.
I hope the #20 is a torch that will fit on the copper fittings of my existing hoses.
I am pretty sure the fittings will work as both are about 200 amp torches. Hopefully.
I don't mind hanging onto the #26 torch.