So I purchased the Harrison Labs inline attenuators (12 dB) (from Parts Express, no affiliation on my part) and inserted them between my FP III and my solid state amp (AKSA 55 N+). That took care of the tube hiss/rush almost entirely. I'm using some ~93 dB/watt open baffle speakers that I built and can only hear the hiss when I put my ear right next to the driver. All I can say is, wow. Make that WOW! I now get to listen to the FP-III with all that is has to offer. I've only just begun to listen to my library and I really enjoy this combination. Now I need to finish my Seduction and get my vinyl out... so many projects, so little time.
Cheers for the support and great preamp!
Ryan