Just need some advice. I'm getting ready to buy a new boat and after looking around for a while I've pretty much decided on getting a ZX190. The hull is rated for 175hp but most of the boats I've seen have a 150 VMAX. I really want the VMAX HPDI motor and I said that whatever I got......I was going to put the biggest motor on it I could. Is there going to be a big difference in perfomance between a 150 and 175 hpdi? The salesman at the dealership said that the difference would be marginal and I'm looking at about $1800 more for the 175. Any advice would be greatly appreciated.