My PSO is a huge Motiv dealer. I inquired about a Forza a few months ago and he specifically dissuaded me from buying one. He also showed me a Forza that he was plugging and redrilling for a Motiv staff member to try and get some sort of reaction out of it as it just wasn't doing anything for the staffer.
Your plan to try 1000 or 2000 with polish is a good start. Certainly can't hurt anything!
I really like my Primal Rage (I kept it in OOB finish.) It is the first ball out of my bag, but tends to become very over/under once there is some carry down on the lanes. At that point I switch to my pin-under Columbia Antics or pin-over polished DV8 Endless Nightmare (whichever I have with me) and that gets me through the carry down.