Several come to mind but my fav was the Eraser, ball gave me the same look for who knows how many games and still hit/hooked like it did day one. The original EL Nino was another great one, my first "high performance" ball. Too bad the guy in the pro shop drilled it wrong for me and I sold it cause it was great. For heavy oil, I also go with the X-it, ball chews through oil and hits hard every time. Thrown many high games up in the floods when others were struggling to hit the head pin.
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If I could only pick up a 7 pin.....