1st off, why move to 15lbs? the bowling balls today are made I believe for 15lbs, the numbers sometimes are weaker on 16lbs then 15lbs balls. I believe you can bowl better with 15 then 16. Now for ball choices here is a honest guess, since I dont know how you roll the ball.
1st-heavy oil-- Mutant Cell
2nd- House condition-- Nomad Solid and Cell Pearl
3rd- Lighter condition-some sport shots- Natural and Mars
4th- Spare ball-- A MUST- CROWN from RG or a TEAM STORM.
Good Luck and Great Bowling.
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ROTO GRIP RULES!!! YOU KNOW IT!!!
RICK MITCHELL
COLONY PARK LANES NORTH