It's a little like saying "What's best, Fiestas or Ferraris?"
Halos and Reloaders are miles better (a search will revea many dicussions of this before), they're far faster, stronger, smaller, better balanced, and replacement boards are available (well, for Halos). Eggs are very hard to up, bulbous and badly balanced.
They are, however, as cheap as chips (something like £25-£30 2nd hand)