I've settled on using only 2-3 layout combos and letting cover-core allow me to fill gaps in the balls that I carry.  I have a T-Road solid (2000 no polish) RICO'ed that I like for heavier patterns.  I'm looking for a pearl or hybrid suggestion to fit in below this ball to be drilled RICO, and before I get to my pin under, stacked, Neptune (2000, Lt polish) and pin in ring, stacked, Avalanche Urethane (4000, Lt polish).  PAP is 4.625 over, .375 down (yes, down). Right handed, 16 to 17 mph down lane, tweener with decent "hand" (I've been told).  Don't want to go top shelf, 200$ current stuff.  Around here mid performance goes for 120 to 150 drilled and I got to keep my driller happy and I owe him a full ball purchase once in a while, I'm sure that he gets sick of plugging most of my stuff.

Some old guy,,,
Current Stuff:
NVD - oil   Kinetic Energy - med oil
Neptune - lt oil   Av Urethane - dry/spares