We're getting ready to purchase a new headsail roller furling unit for our Irwin Citation 38, but know very little about the pluses and minuses of the various brands out there. Right now, we're looking at Harken, Profurl, and Alado Nautica. Is there another brand that we should be looking at?Considering initial price, ease of installation, ease of maintenance, longevity in a saltwater environment... which is the best overall unit out there? We're looking at extended cruising, so want to avoid units that can't take blue water or salt.TIA,Don W.