What's the best RAM to get to use on a Gigabyte 7VT600 motherboard if I want to start off with an XP 2400+ or XP2500+ CPU but would also like to keep the RAM should I upgrade to a 400MHz bus chip in the future? If I'd need to replace the RAM to work with a 400MHz CPU I might as well just get PC2100 to save money. Suggestions?