Porkchop-------
 Bought mine used on ebay for 45$--not sure of pin measurements or top weight--just asked the pro shop guy to drill it max leverage. Works wonders on scorched lanes and ten pins can be picked up easily. First time I used it in league I shot approximately 650 when everyone else had to throw whatever ball they were using as hard as they could to keep it on the right side of the head pin.
 The other nice thing about this ball is that it makes a perfect practice ball. If you make a mechanical mistake with your delivery the ball will tell you.
 I'd recommend max leverage for you too, unless you're a cranker. Then I'd suggest talking to your pro shop ball driller about a drilling pattern for your home lanes.

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Chris