My point here is that PC3200 will work for you even if you eventually get one of those 400Mhz Barton chips down the road, or overclock, or change to an Intel 800fsb platform, whatever. But if you've bought into PC2700, it may overclock enough to run, but maybe not, and certainly not with the best possible performance. Then you're looking to buy new stuff, losing all of your investment. For the rather small additional cost it can be had now, so there are no worries down the road. And it's likely to perform with better specs now at 333 to boot (pun intended).