dont only pick a hopper due to its speed. (would you by a car just because it has a faster top speed, than the better slower one next to it)
Although the pulse is the quickest, it does seem to have shell issue's (feedneck snapping off, and cracking) obviously wear and tear would casue this on any loader. BUT the good thing with Pulse's is, if the shell break's, send it off to draxxus, and they will send you a nice new shell.
the Vlocitys are also pretty quick, and come it three different versions (Vlocity, vlocity JNR, and the XSV vlocity) the Issue's with these seem to be , they are heavy on battery's, and the shells are weak (personal opinion).
the Empire reloader B, Sound activated, uber relieable, very good on batterys, very up-able.
if you wanted to go for a loader, than you could buy, and stick on any marker, and work with out hassle, day in day out, week in week out, go for the reloader.
but in the end, you'll go for the one that you like the most, and is most shinny
-james