You wanna be careful about choosing your hopper.
I have had the pleasure/misfortune of using an eggy, revolution, halo, and empire reloader.
i must say go for the halo/reloader depending on your marker, angels have problems with reloaders but like halos.
Eggys fall to bits and do nothing like the bps feedrate they claim once attatched to the marker. However they will do for a while.
I have not used the Vlocity, however despite its looks I am tempted by its speed and price and little perks like the feedneck.