Lost of paintball fields have airsoft days too btw. It can be fun- but somewhat like paintball- economics rule.
What I mean is the guy with the 400 doller AEG with upgraded parts ( AEG = full auto - and Hi capacity clips) can just spray your ass- while you sit there with a shitty springer that you have to cock to fire.
That said Ive always enjoyed sniping
Really depends on your group though like everyone said- if you are buddies are just foolin around then just get cheapo pistols- if your serious get a AEG or a sniper rifle on ebay maybe