Having used all of the new balls that have come out in the past year, they have all worked well on tournament or house oil patterns.  I would suggest that you use the Lethal Revolver as your medium oil ball for house or tournament conditions as the benchmark.  With the 2000 out of box surface, it will cut through the heavier oil and still have a strong backend reaction.  When the Lethal begins to hook too much, the Massive Damage is a great transition ball that can be used as the first out of bag as well.  With the polished surface, the Massive Damage will get down lane farther and have a stronger backend reaction.  The other ball that I would suggest for when the lanes transition and open up is the C*(System) Ulti-Max.  The Ulti-Max will clear the front part of the lane, and have a strong backend reaction and works good on medium oil patterns.  If you are looking for a VERY STRONG reacting line of balls, then the Nexus series can handle the heavier oil conditions.  The Nexus Solid is the strongest ball in the Brunswick line, and the Nexus Pearl is the strongest Pearl in the Brunswick Line.  The Karma Solid and Karma Pearl would be good for house conditions and can handle medium oil.  Good luck with your decision, and let us know if you have any other questions.