Owning a 6m ribeye with the 100 yam, I can only say the engine although being faultless the whole 10 years of owning, does not set your adrenaline pumping. It's fantastic on the wallet and been a joy to service and maintain, but perhaps if the ribeye had a 150, things would be a bit more exciting.
I can only guess the 150 verado would be a a lot more fun.
I wouldn't want to change the ribeye, but I would have liked a bigger engine, but limited by transom build. Perhaps my answer would have been to have the lighter verado.
I like yourself, use the boat to go over to the Isle of Wight , skiing, beach BBq's etc,. then you would appreciate the low running costs of the 100 yam.