I believe Nautical is correct on the Yamaha 150 hp. If you look at the fuel burn you will see that its' output is around 160-165. It has been made for many years and not as tech (fly by wire etc.) as many never models but Very dependable. I have one and love it.
On the OP's original question: Researching the Ellipticals vs Two Tubes vs SPS brought me to this forum. In my research and reading most every post in this forum and others on the subject I have an opinion, yes only an opinion. If you are just doing cruising and want the most initial stability and fastest cruising speed then the Ellipticals are the better choice however, if you want to do any type of water sports where faster turning will be a factor then the SPS is the better choice.
If you ever want the boat to exceed in pulling tubers or skiers then you should pay the extra couple of grand and get the SPS....Yes, the Ellipticals will pull skiers and tubers but turns flat and will never make a superb tow boat. I am older and will just do cruising and so I am leaning toward the Ellipticals but just to let you know that I have neither at this point as selling a CC before I jump to the Bennington.