getting new paintball marker, need air help please!
 

I'm getting my first "real" marker today, a Diablo Wrath w/ Halo B(w/ Victory), and am not sure what air system to get for it. I'm gonna get the Crossfire 68/4500, but do I get the 800 output or the 450 output?

get the 450 output. the Wrath is a low-pressure gun. you'd use the 800 for a Tippmann, or a similar high-pressure gun.

even with an adjustable regulator? I was also told to get the high pressure because it would be better all around for different guns if the Wrath were to break.

yes even with an adjustable regulator, i'd get the low pressure. it's what the gun is meant to work with. god forbid something goes wrong and the reg doesn't work, the internals of your gun will be useless. besides, if you're in the Wrath price range, most other guns use low pressure as well. like i said, the high pressure stuff is for high-pressure guns, like Tippmanns.