I sorta hate to pimp AMD chips ATM (I may have one, but I'd prefer a C2D), but damn, they are cheap now. AMD has cut prices big time; all but the 6000+ are under $200. Hell of a price/performance ratio! Even the X2/6000 is looking mighty tempting.
Model____________Old____New
Athlon 64 X2 6000+ $464 $241
Athlon 64 X2 5600+ $326 $188
Athlon 64 X2 5400+ $267 -
Athlon 64 X2 5200+ $232 $178
Athlon 64 X2 5000+ $222 $167
Athlon 64 X2 4800+ $217 $136
Athlon 64 X2 4600+ $195 -
Athlon 64 X2 4400+ $170 $121
Athlon 64 X2 4200+ $159 -
Athlon 64 X2 4000+ $144 $104
Athlon 64 X2 3800+ $113 $83
Athlon 64 X2 3600+ $102 $73
One interesting tidbit: the X2/6000 actually uses MORE power (and thus generates more heat) then the just-introduced QX6800 chip - a quad core, 2.93GHz model. But then again...you can't argue about the price.