while using poppers with an intermediate line is possible, it can be a real pain, particularly if you let the popper sit even for a few seconds after you strip. the line pulls the popper down. i'd recommend getting a floater for the poppers. i like a heavy front end line like a bass taper to turn over large and/or heavy flies.. i use the rio clauser line. but there are plenty of others. the sci angle striper line is also great.
on another note, that 7' 11" 330 grain sage bass rod may be the perfect size rod for the boat. but, i don't know how well it will stand up to salt water use.