I replaced the old HeadFoil 2 foil about three years ago with the TuffLuff Aero. I've used the Harken Carbo Foil on other boats and don't have a preference between the two.
The HeadFoil 2 was ancient - these things have a pretty good life span and both the cost and the ease of installation are pretty minimal.
If you do any racing at all, go with a foil. If all you'll ever do is cruise, then I can see a furler being attractive, though it's not for me. I don't see any good reason to go with hanks.
