I enjoyed your post. I'm not happy about what you're going through, but you did mention being the son of a prominent elder if I'm not mistaken. Maybe you could talk to him about your "doubts" and get a feel for how he'd react. Start with 10% of the truth and work up from there if he's understanding and receptive.
edit: oh and just so you know, while married to a JW I went through all that, and finally decided no (religious) man is gonna tell me what to do, how to view/behave spiritually, and I stood up for my feelings and told the elders to go fuck themselves. Maybe you get DF'd. Maybe, horribly, you lose your dad. But make peace with him. Before my DFing announcement I told my mother-in-law I was gonna get DF'd and she broke down crying and said "if I have to choose between you and Jehovah, I have to choose Jehovah." That was 5 years ago. 'Course i wasn't happy at the time but I got over it. In 5-6 you'll probably get over it too. And the best part is, I say shit good luck, goddamn, and all that and don't think twice. :) But for reasons i wont get into here I refuse to say "god bless you" when someone sneezes (Seinfeld had something to do with that....youre SO good looking)