Well - you'll get a good AMD CPU and mobo for about that, but you'll need some serious cooling to get it stable over 1GHz I expect. I see the duron 850s are from about $74 on pricewatch - so you should hit your budget okay with an A7V133. You have 133 RAM already (presumeably CAS2 - SiSoft SANDRA will tell you, although my old CAS3 PC133 runs at CAS2/148 - I guess I'm lucky!)
The Athlons start a bit higher, but are slightly better optimised for todays world. Looks like the 900/950s are coming in at a good price. Get one with a code set of AXIA (first four initials on line 3 of the die) as they seem to have the best overclocking legs.
Pete.
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