building a new computer

i am Upgrading my computer
my wish list is as follows
AMD 2400XP or 2600XP ??
Gigabyte 7vaxp-raid motherboard ??
512 PC2700 DDR ??
i already have a Abit Siluro Gf4 TI4200-8x and 2- 40g Harddrives
is this a good config or is there a better motherboard