I've got a the Mercury 150 fourstroke on my boat now but am in the process of ordering a new boat that will need a 250 on it. One of the things I really like about my present motor is how quiet it is. I can idle around looking for structure on my electronics and can hardly hear the engine running. From the few videos I have seen it seems that the new V8 Pro XS is quite a bit louder at idle, kind of like a muscle car. Is that really the case? I haven't been able to hear one in real life. If it's loud like a 2 stroke Pro XS then I'd consider getting the regular non-Pro XS fourstroke, or even an SHO.