I had a Polaris 165 and was not happy with it. Primarily, because it would not clean the entire pool. I'm looking for suggestions from your experience for something new. I would like something that would operate off of the pressure of the returns. I guess something that would operate of of a skimmer would be ok too. I don't have a dedicated suction line, and don't want to install a booster pump. The pool is 8500 gal. (12'x30'), vinyl liner and SWG.

Look forward to your suggestions.