ugh FX is for enuthists, unlocked multipliers. You can get huge HT link and still keep a sane clock speed. Opties can only go to a 2.6ghz anyway i think? but the fx is not worth the 150 bucks more.
From the comp you have now, i would just get a cheap opty oc it a lil, or mabye a 3800X2. Make a new system after with all your $3500
. That would be awesome.