the Xiggy linked only mounts in a north south position on AM2, not ideal unless you have a case than vents or exhausts out the top, or are willing and able to make a custom mount.
The Noctua is out of your Price range.
Frosty tech does not use real CPUs to test, but a simulated heater mount. Thus, while their results are a decent reference point, I don't hold stock in their specific order. If an HSF is in the top 10 or 20, its probably pretty good.