I use mostly Diablo paintballs,Blaze,Inferno&Hellfire which is consistently damn good stuff at good price.
Zap's Mars is good & a good rival company with good stuff.
Rps Marballizer is as good as Hellfire & Mars.Ive looked around & its too expensive compared to Hellfire or Mars.
Ive heard that Nelson is good stuff,i looked at acouple of bags of the neon bright yellow paint & none of um had any imperfections from wot a saw just Inferno&Hellfire.