I had a Harken furler on my previous boat, it worked great.
I have a Schaefer furler on my current
boat, it works great. I suspect that Schaefer weighs slightly more than the equivalent Harken units, uses a round foil rather than elliptical. I went with Schaefer on the new boat as Schaefer allows you to put the furling
line on a winch
if necessary, and Harken specifically says not to do that.
I avoided ProFurl specifically due to the steel
I have a couple of comments regarding the Spin-Tec furler; this furler design works by having you go to the masthead and shackle the head
of the sail to the furler top bail, or, you can monkey around with the 'halyard accessory' to hook the sail onto the furler top bail - neither is easy when the boat is bouncing around the ocean.
If you DO use the 'halyard accessory', the top of the jib
is attached to the furler top bail with a simple hook (has no positive engagement) - this is problematic as the sail is free to fall off the furler top bail.
I would not recommend a spin-tec for anything offshore
that could conceivably require changing out a headsail. If your boat has one and only one headsail then the spin-tec makes sense, as you'd never take the sail down (unless there was a hurricane
coming in, in which case you go to the masthead to get the sail down).