I personally think the Rotor is the best loader you can buy - a Halo is perfectly adequate and will feed as fast as you ever need, but a Rotor:
- is better built (bomb-proof shell, no cracked shells or battery doors on this puppy)
- is MUCH easier to strip (10 seconds to get the whole thing in pieces)
- has incredibly battery life (I know people who have played 6+ events on the same set of AAs)
- issupremely reliable.....I'm yet to see a broken Rotor.
Only downsides to Rotors are a) they cost a lot and b) the don't like Reballs. So if you've got the money and don't use Reballs, I'd say go for it.