I'm not an expert, but don't most sport leagues put out different patterns each week?
I know a co-worker that is doing a summer sport league and they are putting out a different PBA pattern each week.
If the patterns are constantly changing, I don't think you can get pick just one ball that will be good for handling every pattern (unless you pick plastic or old urethane and just throw straight to the pocket).
You would probably want a couple of different balls and/or different drillings depending on the pattern. (ex: something to handle heavy oil, carrydown, dry heads, crisp backends, etc), so maybe something that has a nice smooth arc, and something with a strong skip/flip reaction.
Of course, you could just pick a ball and learn how to adjust to the conditions (I know a few people that only have 1 ball and just learn to play different lines, adjust speed, or alter their revs to play the conditions).
Either way you don't have any info in your profile or much information about your style, weight preference, or amount you want to spend. I've noticed that the more information you provide, the better the advice you are likely to receive.
There are plenty of people on here with balls for sale (new and used) and you could probably get a couple of good balls for the price of something new in your pro shop.
