I agree. It's cheaper than the x3 Athlon IIs you have listed and is a quad core. It's only clocked 100MHz less than the x3. Appearently, it also does well with overclocking. Canada Computers has it on for $108 last time I checked.
The x3 is great but they seem to be so overpriced you might as well get an x4.
If you want something that will perform a bit better than your old processor as opposed to upgrading with this buy, go for the Athlon IIx2 240 at 2.8GHz. Canada Computers has it on for $67.99 last I checked.
Both processors will be fine with gaming on your current build.http://canadacomputers.com/