If you are unsure if you want to drill it for yourself, you might consider selling it.  Those used to fetch huge numbers on eBay a few years ago.  Not sure if that's still the case though.  I wouldn't mind having it if you decide not to drill it for yourself.

 

Anyway, mine (wish now I wouldn't have given it away) was the definition of smooth.  Best for medium oil, but could handle everything except the extremes with the right cover prep and release changes.  Heck of a control ball - would probably be great on sport patterns.  Cleaner than urethane through the heads and a nice controllable curve (not really an arc, certainly not a flip) after the mid lane.

If you want to get a rough idea of how much its worth, start a thread over on www.bowlingballexchange.com.  Plenty of sawheads over there, they can give you an idea of how much its worth and if you are set on drilling it they can even give you advice on layouts or surface adjustments too.