Otherwise, either go AM2 or better yet, go Intel Core2Duo.. I went with S939 because
1. I'm poor
2. I was part of the upgrade process
3. didn't have all the money all at once... (And I'm impatient)
Actually the only advantage the AM2 has is that is can upgrade to the K8L processors when it comes out late this year, early next year. I think in benchmarks when compared to the same s939 chip the s939 has a slight performance lead.