I bought an ’07 new and it has the 150 optimax. Still have it as it has been flawless in the years I’ve owned it. I’ve got around 700 hours on the optimax and the only things I’ve done are routine maintenance. Performance is definitely sensitive to the load you’re carrying. With light fuel and minimal gear, the best I ever saw was 49.9 mph. After adding a kicker, anchor, and a ridiculous amount of gear, more typical top end is 44-46. Hole-shot definitely suffers with added weight, whether gear or people. I’ve tried a number of different props, but the best all around for me and my typical usage has been a 17p rev4. This balances a great hole-shot even with a load, along with great mid-range response, fair top-end, and does well with pulling my kids on tubes. Let me know if there are any specifics you have questions on and I’d be happy to answer.