To be honest I had a lot of mixed emotions when it came to my Evolve... at the time I got it I was looking for a heavy oil ball and picked the evolve over other balls like the virtual gravity, this was a mistake for me. The evolve proved to be, at OOB, a great medium oil ball, good on a THS, but was very 'wiggly' at the break on much more oil than that. I sanded the cover down to 1000 and still couldn't get a good read on heavy oil, ended up selling the ball.
The ball was great on medium oil though, so for you, given what you say you bowl on, it might be perfect for you. I personally didn't like mine, but only because I got it to use on heavy oil, and for me it was far from being able to be used on that.