Actually, it's been proven that rifling paintball barrels is about as useless rifling the barrel on a nail gun, doesn't make any difference whatsoever.
Boomstick on a spyder seems like a waste to me. You spend a hundres bucks on the boomstick, when you only probably spent 30 bucks more than that on the marker itself. If it were me, I'd get a Dye Excell, JJ ceramic, CP, or something like that.