I would recommend a good used aka sidewinder with the long top. I have a few per 2k's nd this is what I use. I found all mine for 45 - 50 bucks. The main reason I use them is the amount of volume at the top of the reg (this air is also behind the valve) and it increases the volume. I run mine at about 250-260psi with blue spring on tornado and green on hammer.
Best half of the "Last Minute Men"