If you can find one, a Roto Grip Horizon Pearl is a great ball. I've thrown a couple of really big sets with that ball and its always in my bag.
Otherwise, might want to try Storm T-Road Pearl. My father is absolutely in love with his, and from I can see its a solid piece.
Could also try the new Hy-Road. Might be a little higher than Mid-Range, but not much. Yes, it does have the hybrid coverstock, but its a very easy ball to throw and won't jump left when it sees dry boards.
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University at Albany 2007
-Let's Go Danes-
ROTO GRIP - King of Them All
STORM - The Bowlers Company