Do you trailer-sail the E23? I'm not sure how easy it is to rig a furler every time you step the mast?
Anyway, I ended up going with what the sailmaker recommended. (i.e. what he sells) Selden Furlex. I haven't had any problems with it, except I had to re-drill the hole in the bow tang because they don't seem to make pins the same size that they did in 1970.
If you wait until the Portland boat show in January, most of the shops will offer "boat show discounts." I got mine from Dale Waagmeester, on Alberta in Portland.