Wow I've owned a lot of boats and had a lot of furlers;
Here's the list and my take on the ones I've owned.
Served me well, always worked, but had minor corrosion issues. (this was not the single line model)
Served me well, and always worked, but had some small plastic pieces that broke like the lower bearing cover for the swivel.
Served me well, always worked, zero problems.
Numerous problems upgraded to the Furlex listed above.
Worked, but of questionable quality, esoteric, and now defunct.
Served me well, always worked, zero problems but company tough to deal with (parts).
Harken MK-IV -
Installed last spring and working flawlessly but the line that comes with it sucks!
So in short I'd recommend a Harken, Furlex or Schaefer. I personally feel the Schaefer is the most robustly built but it's also the most expensive unit of the three. That being said the Harken MK-IV, I feel, currently offers the most bang for the buck and I like the "over turnbuckle" design. A Unit 0 would work well for your boat..
If you're doing it yourself the Harken was the easiest to assemble. Not that any of them are hard though..
The drum will slide right up the extrusion for access to a head stay turnbuckle..