Catalina is currently installing the Schaffer 2100 roller
furler on the mid sized boats. Although I don't know exacty what is recommended for a C-27, you can't go too far wrong with
Harken, Schaffer, Hood (NOT the continuous
line unit!), Profurl, or any of the other name brands. I would strongly recommend against the CDI as it's really designed for smaller boats (although they claim that it is suitable for up to a C-30), the halyard is integral to the
furler, the drum is tiny (that means low power when you need to reef the genoa), and it is strictly a
furler (that is either fully out or fully rolled), and the plastic extrusion is the bearing. CDI is cheap for a reason.
All of the other major brands above (with the exception of CDI) can be used as roller reefers to safely decrease the size of the headsail when the wind pipes up. In addition, the major brands use ball bearings which improves the ability to furl the sail.
I would go to teh website for Schaffer, Hood (Pompanette),
Harken, Profurl), and / or talk to them to get their recommendations. There are a lot of each of these units on Catalina 27s.
Steve
Alchemist C-320