It also depends on your style. Dry lanes and matching equipment are a tough task - I "needed" 4 balls to find what works for me and my slower speed.
In general, a mild reactive ball like entry level balls are a good choice - azguy mentioned some choices. For dry lanes, make sure the ball has not an RG rating that's too low, unless you are really speed-dominant. The center-heavy contsruction will make the ball bleed its energy fast upon contact with dry boards, and it can roll out easily, hitting weak.
Urethane is also a very good choice - the older Faball Hammers are good dry lane balls on today's conditions (even with their low RG core), and there are several more modern urethane pieces available right now, like Visionary's Ogre Urethane, Storm's Natural, Brunswick's Urethane Groove (it just has a pancake core) or Lane #1's Liberator (which is rumored to be quite strong, and pricy).
You can also do something about dry lanes with your release, e. g. adding side rotation for a longer slide phase, or break back the wrist to tame down the hook.
Good luck, though, this is a tough challenge!
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DizzyFugu - Reporting from Germany
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