One thing for sure, PWC owners are very very brand loyal. I own a Sea Doo, and would recommend you get a Sea Doo. Siksukr owns a Yammy, and he thinks you should get a Yammy.
Whatever you decide on, my suggestion would be to get some seat time on whichever brands you are considering. What is right for me, may not be right for you.
PS...buy a Sea Doo, you won't regret it. 