Acecare 300 bar carbon fiber tank, what valve?

AliExpress has this 6.8L tank for about $225 with three different valves. New to PCP and related equipment. What valve do I want? I have a GX CS4-i compressor to fill the tank so DOT is not a concern. Just not sure what valve to order.

Tank 1.jpg
 
AliExpress has this 6.8L tank for about $225 with three different valves. New to PCP and related equipment. What valve do I want? I have a GX CS4-i compressor to fill the tank so DOT is not a concern. Just not sure what valve to order.

View attachment 557016
Looks like it's supplied with a valve and a foster knockoff, you just need to finish the whip. Beware the chinese fosters are almost never in spec and are almost always chrome plated brass(they'll work, you can be as lucky about that as you like) . It states in the ad m18x1.5 thread so that will get you going on your search. I like the ones with a male foster out because all my bottles are standardized on that after I got a great white in trade.
 
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AliExpress has this 6.8L tank for about $225 with three different valves. New to PCP and related equipment. What valve do I want? I have a GX CS4-i compressor to fill the tank so DOT is not a concern. Just not sure what valve to order.

View attachment 557016
I know my initial response was kind of unhelpful, that's what I get for posting when coworkers are asking me questions.

I'd go with the left side or center option. I have the one on the right as a standalone fill station and it's a mediocre setup. The one on the left is exactly the paintball fill stations you can buy in Amazon for 50 bucks and I have 3 of those (they're good enough and use more standard replacement parts) and the center one on closer inspection is where I would go if it were me. You will be replacing it one day, but that's not a huge ordeal. Guages get a memory and seals/burst discs go on the import stuff rather quickly.
 
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I have their dual gauge valves on two of their tanks, it's the black one, the first option on your screenshot. I like them because they have a one-way fill valve, and the second gauge that lets me know the tank pressure I prefer this to dead heading a single gauge valve. I can slow fill with them fine.
Yeah, I just got two more of that style to swap out existing ones. Way easier to use than the the rest.
 
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I have 2 (1.6L (non-acecare) and 4.7L acecare) tanks and they both have the valve in the first option (in the image you posted, which has the middle one selected) and they have been perfect. I like this valve because it provides a Foster (male side) fitting with a built in check valve that makes filling the tank so much easier as your compressor usually comes with the female side of the Foster fitting to connect with. The check valve helps insure that the air doesn't rush back out of your tank when you relieve the pressure to disconnect.

So, I think the valve to get is the one you think best as they at least 2 of them seem solid.