Which engine ?

So after trying to find a smaller boat so we could sell our truck and tow it it with our Expedition and to get a better wake then our 2004 Ski Supreme Sky Supreme V230 we have decided to just look for and probably buy a 2004 Malibu Wake setter LSV but I would like to know first what engine I should look for the boat to have my options are either the 340 hp monsoon, the 375 hp LS1, or the 380 hp hammerhead the boat will be used in Lake Tahoe 2 weeks a year and the rest of the time in Lake Sonoma. We will probably be using just Stock Ballast and have about 10 people in the boat when we are up in Tahoe but we will only be having about 4 to 5 people in the boat when we are at Lake Sonoma. So what engine would be best for what we do and where we will be using it.