one that works well on medium conditions.
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 your welcome
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The harder I try the harder they fall

IMHO, anything with a PK18 coverstock from Brunswick and derivates under other brands fits this bill. That said, the core might have major impact, since you get PK18 balls with relatively weak cores (Avalanches) up to low RG pieces (Copperhead) and even wild, asymmetrical high end cores (Awesome Finish, Solid LevRG). The surface can be tweaked easily, it is very durable material, and reacts less itchy to friction than more modern shell material.
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DizzyFugu - Reporting from Germany

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Roto Grips Illusion/Grand Illusion and the Nomads or Global/AMFs Maniac, Lunatic and Clutch even though I hear there aggressive OOB, with a fresh 4k pad my Lunatic is perfect for mid range conditions.
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Only throw the good stuff, Roto/Global.
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RIP Sawbones