If you're seeing a true average or medium amount of oil, the Power Swing or a Noize at 4000 grit Abralon should make good benchmarks, from their current selection.
We're at that point in the season, where the manufacturers are putting out many new balls for the Bowl Expo show this week. You might want to wait a bit until there've finished and they're all available and some mini-reviews have some out, IF you want the latest and greatest.
Otherwise, the Power Swing, as it stands, is a fine benchmark, as is the older Rival, if you can still get one.
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"None are so blind as those who will not see."