Sharing some data because there's very little about this boat coupled with a 150.
Last year I bought an x18pfc with the pre-packaged 115 Yamaha SHO. The boat had a PowerTech 19 pitch prop and ran 46mph with just me. With two people (370 pounds) and full live wells it ran 42-44mph. 470 pounds of people, it ran 40-41mph. Anytime the front livewell was full it would drop off pad, causing me to trim down and lose speed.
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This week, I repowered to a 150 Yamaha SHO and 6" hydraulic jackplate. Today, I ran a Mercury Tempest prop 24 pitch. Fully loaded, but just me (200#), it ran 5600rpm and 56-58mph. It didn't seem to matter if the livewells were full or empty. The boat ran best about 5" prop to pad and slightly above neutral instead of at full trim. The boat handled extremely well, steered great and had no chine walk.