$140 for a new computer? Hmmm
Definitely worth it...but I would get ddr2-800 memory instead, because amd likes the higher ram and the performance boost is noticeable.
How much of a % difference in performance would it make from 533 to 800?
I'm going to run mostly internet and old/low-gpu-intensive games. (Going to use onboard video till later down the line)
A good %5-10 faster, so I would definitly go with the ddr2-800 memory if I were you. If you live in the US then you can get a gig from newegg for around 80 bucks, and two gigs for around $130.