Re: Boston Whaler Harpoon 5.2
While shopping and ultimately buying an O'Day Daysailor, I checked out a couple and saw listings for a couple other Harpoons. From what I could gather in my research, they are very well-regarded and fetch good prices (compared to, say, my Daysailor).
That said, I'd suggest you consider how you intend to use a 16 footer... Daysailors aren't the fastest, but they're solid predictable sailors. There are many fleets if racing is of interest, but recognize they're not "racers" like a 470 or even a Buccaneer. Their parts are readily available and they're very roomy (especially the DSI model).
In short, for family outings on the lake or (casual) racing, an O'Day Daysailor is hard to beat for availability and low cost of ownership. But if you're set on a Harpoon and can score one, you'll have a very good boat and never have any trouble reselling it.