No bad balls, only bad bowlers!
I have no real preference in terms of manufacturers. There is a lot of quality stuff being sold out here these days.
In my arsenal right now: Roto-Grip, Storm, AMF, PBS and Track. If my house should suddenly change oil volumes, or change the shot, I'd go into my laboratory, switch out my arsenal to: Brunswick, Lane#1, AZO, Lane Masters and Columbia in a heartbeat!
My teammate owns mostly Radical, and I throw his stuff better than he does! But, I already have enough equipment for my needs!
No bad balls, only bad bowlers!