I have been considering upgrading the motherboard on my older computer (soon to be the kid's computer). This computer has the ABIT AT7 using the VIA KT333 chipset. Is is worth upgrading to the Abit NF7-S2 ($65), Asus A7N8X-E ($89), or Asus A7N8X-X ($63) with the nForce2 Ultra 400 chipset (1st two boards) or nForce2 400 (3rd board) using my Athlon XP 1900+ and DDR333 memory? How will I benefit?