I'd love to enter my vote in the poll, however, I haven't bought any of these titles and none is not an option. Therefore, I'll post my answer... Hey I just did !
I've got SS and absolutly love it. I'll be grabbing Fiend Folio, but the others I'm not too big on. I don't use FR, though I do like some of the magic, etc. I'll flip through em at least. Anyway, this year I'm going to be broke enough...with Ultimate Alien Anthology, Hero's Guide, and Galactic Campaign setting for Star Wars d20, then the Revised books for D&D. Will be a book buying year for me.
bought SS, will cetainly get FF (unless it REALLY sucks), so i voted for those. Would probably like to get all three otheres, but will wait and see. Most likely to get A&EG before the FR books.
One of our group got SS from his girlfriend for Valentine's Day. Her comment was, "Well, I know he'll enjoy it, and I can use it too."
For some bizarre reason I can't vote, but I have SS, and plan on getting A&EG and FF. I'll look at RoF, as someone else in the group will get it, and maybe get it later. No plans about Unapproachable East, though I may have a moment of weakness in June.