Most that we've drilled have eventually ended up around 2000 abralon, which is a nice compromise between the box finish and polished.
I've said it here before, but when adjusting the coverstock, do it in "increments" so you can get a truer read on the lane. Also, try it a few times at each stage, so if the condition is different you can see how the ball is affected. To go from extreme dull to extreme shine, or vice versa, can sometime lead to more frustration. Good luck.
--------------------
Lane Carter, Strike Zone Pro Shops - Salt Lake City, Utah