I like the 4400+ or 4800+ ... the extra cache is a plus.
The 4400 (2.2Ghz) runs well at 4800 speed (2.4Ghz) (220 FSB and std voltage here with top cooling).
Hard to find an FX 60 .. .which is the fastest (2.6Ghz and EXPENSIVE) but who wants to pay triple for 200Mhz.
Teh Opty's are also better silicon as they have been rigorously tested ...
If you don't plan to OC the chip much then look for a 170 - 185 ... in that range.
Post something when you have it up and running !!