To Rebuild or Not

[rcnight]

I know this subject was recently discussed, but the discussion didn't go the way of my questions. I recently purchased a 1983 20' cc with it's original 185 Johnson. The motor is in need of a rebuild - something loose inside, although not too bad. Is this motor worth rebuilding for occasional weekend duty or should I move up to a newer motor? I have a line on a 1997 Evinrude 150 Ocean Pro. Would I be happy with the 150 hp or wind up craving more hp down the road? I can't get too deep into my pocket at this time. Thanks for your input.