I currently bowl two nights a week on leagues and average anywhere from 200-220. The only ball I've been throwing for the past 3-4 years is my Brunswick Absolute Inferno, which I absolutely love. It's a very smooth rolling even arc ball. The oil patterns for both leagues are THS with medium units of oil.

 

I'm left handed, with medium speed, and medium rev rate.  I typically stand around 20-25 board and throw over 8-12 board.  I haven't really been paying much attention to what's out in the market these days, but the guy who drills my balls says that Hammer has got some nice equipment to choose from.  He suggested I get a ball that will give me a different look, such as one that will give me some more length with a stronger backend reaction.

 

Does anyone have any suggestions? 

Hammer Taboo works great for me, the 1st ball out of my bag, haven't had to use any other of the balls in my bag lately since I'm having great success with the Taboo.. this is one of the hottest balls on the market right now.  Good Luck.

Onyx Vibe, an Infection is a great ball but is pattern & oil amount specific, the Onyx Vibe gives you the control and hitting power All left hander's crave.

Props to Afflac for dumping Gilbert!