plastic will work, but most of the time plastic wont get you a score high enough to win. it might for some, but for myself and many others, plastic is a last resort, especially in tournaments. it might be a mental thing, knowing ur using a $50 plastic and ur opponent might be using a high performance ball, i would give him the advantage.
for dry or any condition, the main thing is to get a ball that matches up with the condition. you want the stats to be right, for dry; something with a low Diff, medium/high RG, and usually pearlized. most companies have balls that will fill this void. from ur sig i take it u like dynothane, but i don't know nething about dynothane so i cant recommend nething. however, i have seen others be very successful with the various balls in the storm hot line and columbia 3 piece series. for myself, the lane 1 bullet does the job nicely and doubles as my spare ball.