If you don't want to go to the pro shop, watch, ask someone in a league that you see all the time. Ask more than one , that will give you some options.
Keep in mind I do not know how you stand, throw, your style, but you might want to think of two balls. One on your list and keeping your other for a spare ball. You seem comfortable with it, but if you feel you must have a new ball, look at a White Dot for spares, tough to beat them for that.
As Chris said, your best shot would be the Pro shop, and I agree, I just gave you an option of asking someone who you see a lot and watch them bowl, the more you ask, the more options you will have.
Good Luck !! and practice...practice...etc
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AZ Guy aka: R & L Bowlers Pro
rlbowlerspro@cox.net
www.rlbowlerspro.comSleep is over rated.