It's not my way to get invovled in "which ------ should I get" threads, and I don't want to add to an argument over something stupid, but what does using full auto have to do with using a HALO B or egg? The Angel Speed (and all it's predecessors) fires much faster in semi than it does in full auto, so using a HALO B is quite justifiable.
And, as long as I'm here, I may as well comment on hopper selection. I have a HALO B on my IR3, and I love it. Feeds faster than anything (22 bps should be fast enough for anyone), true forcefeed system, it's awesome. It basically took the design that VL had in mind when they made the Egg, and made it work the way it's supposed to. In my opinion, it's a far superior design, and a much better choice. However, if you don't shoot that fast, say 14 bps or below, it would be quite safe to save yourself some dough and use an Egg II, as they will more than keep up with that bps.