If you want to stick with the "original" material, BCY's 652 Spectra is the same material as original FF (Bob Destin and Ray Browne, founders of BCY, developed the material for Brownell before starting BCY).
For the latest and greatest, BCY-X, 8190 Universal, or the brand-spanking-new 8190 F (fine). 8190 F was just introduced to the market at the ETAR--it's 100% SK90 Dyneema with no GORE (vs. 8190 Universal that does have GORE).
Haven't had a chance to try it out myself, but initial feedback has all been great.