here are a few vids w/different hoppers all keeping up with the Mag:
First is one w/a evolution: Automag ULE Retro Valve - YouTube
next is a halo on a fast pneumag: Pneumag lives! - YouTube
next is a RT classic with a 12V revvy: AutoMag RT Classic - YouTube
next is a Warp feed w/ a halo: Automag RT ULE - YouTube
and my favorite a MiniMag w/X-valve and a invert too 9v: RTing my Minimag - YouTube
hoping that helps out with your decision on hoppers! for your X-Valve it depends on if you can a afford a new valve...if you can do it, but the way most people here treat there Mags you will find alot of used valves that are mint w/all the spare parts included! best advice is to do your research, buy a parts either before or at the same time you buy a used one, and have fun!!!