I would go DDR if I had a Palomino. Prefetch takes advantage of DDR in a big way, so performance boosts are noticeable. Since it's only a Duron, I would suggest you wait and spend the $50 later on when it will provide more bang for the buck. You will get a performance boost if you switch DDR, but it probably wouldn't be worth it. If another 5% or so is worthwhile to you, then go for it!