egg - slow and looks gay, crap centre of gravity. epically sh1t battery door that always breaks.
halo - stock board has minimal options, upgrade boards are plentiful and decent. reliant on eyes, which if dirty, is a ball ache to clean. batteries dont last as long as reloader.
vlocity - light and cheap, quite fast but eats far too many batteries for my wallet. if your into rechargeables, give it a whirl.
pulse - heard horrible stories of the feednecks snapping in 2, and with litigation, spare parts may be a hassle to source. reasonably fast, nice to clean, runs on AA's.
reloader b - fast, good upgrades, lots of shell choices. no eyes to fcuk up. great battery efficiency. my pick of the bunch.
reloader b2 - as above but more complicated, but good once you learn it. nice lid, too.
bang for the buck goes to a 2nd hand reloader b. they can be had for as little as £50 - 60 if you are patient.
if buying new, if rock an empire b2 myself...