Thanks for the detailed response to my question. I actually live in Reading, I am a kayak fisherman at the moment just looking to upgrade so I can bring friends and family with me.
I'm quite familiar with Blue Marsh Lake, there are no HP restrictions in the main part of the lake right now. Just no wake zones in the fingers of the lake. I also do a bunch of fishing in Marsh Creek Lake and Hopewell Lake, which are electric only lakes, so the engines don't matter too much. Haven't gone yet but I was thinking about fishing at Nockamixon, which I believe is 20 HP restriction. Probably wouldn't be doing any fishing on the rocky parts of the Susquehanna and will stick to the deeper sections so I don't think a jet boat would be the idea situation.
I like the idea of the CMW 1850 but the size of that engine just worries me, but I think the CX 17 could be a good boat also.