That is what I would go with. You won't have to upgrade that Motherboard for a long time (plus ASUS motherboards are awesome quality), especially since it has pci-e 3.0 and 3.0 is just starting to get used by high end GPUs like the 600 series GTX's. The total is just under $400 (not including shipping).
If the thing is Guild Wars lagging like crap then 8gb of RAM is a must, RAM is very important in having to pre-load large amounts of players.
