The importance of getting together with a good ball fitter can't be over-stated. I'd ask at the desk if you can make an appointment with whoever is running the shop. Get measured for your PAP and all that other good stuff or you won't be getting the best performance out of your investment. The shop guy may even watch you bowl so as to recomment a ball model and layout based on your style and the conditions you are most likely to see.
If all you'll be bowling on are House patterns, I'm sure Widow Venom or Pearl would work fine for you. The Original and Bite models will struggle if the lanes haven't been oiled recently. If you wanted to save a little cash, the new Psycho or Vibe would also be a very solid choice.
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Hi, I'm Chubbs and I'm a recovering grab-a-holic...
The Ball Bag (all 15's):
RotoGrip Cell 2000 Abralon
900 Global Break 4000 Abralon
900 Global Break Pearl 2000 Polished
Storm Street Rod Pearl 4000 Polished
Columbia White Dot
2008 Osan AB Singles Champion
HG: 299 (a 7 pin)
HS: 755