kick12x,
I know many will suggest this ball and that ball etc here..
BUT you are not providing enough details about your game and the condition you are bowling on. It is impossible to make proper suggestions without knowing your exact specs, even without watching you bowling.
I suggest you go to a experienced drilled, let him/her watch your game and suggest you accordingly.
If you do not have a chance to do that (I doubt it, though) please let us know your:
Axis rotation, tilt, rave rate, PAP, speed and what kinda conditions you are encountering. More than likely, you will need to get help from a proshop operator to know these specs.
You can also tell which balls other bowlers similar to your style are bowling with (on the same condition). This could give an idea to those who will suggest.
Burak