Im currently lookin int o the same thing and at the moment the vlocity or the jr is looking about the best to me. The vlocity jr is the lightest hopper and holds around 180 balls the vlocity standard also seems good but is heavier but holds around 200 balls. the jr only has 1 mode of feed which is 20 but the chip inside it can be upgraded so that it goes much faster and has more modes, the vlocity comes stock with a good chip and many firing modes but the chip can also be upgraded these chips such as the lucky blitz chip are about £16. The vlocity is £90 and the jr is £70. If you ask me though the jr is the best (if you upgrade the chip) because for £86 you will be getting the smallest lightest of the hoppers.
Pulse are good becuse of how ast they are, but they have the down side of being really big, really heavy and dam ugly, however they also requier an rf chip to gain their full potential and the overall package is pritty pricey plus over on pbnation there are a lot of threads about broken pulses so my guess it they may not be the most well buit.
Ask for halos and and stuff like that such as reloader b I havent really looked into they seem too big and way behing the time in terms of techinical ability.
woah I also cant belive how much i wrote.