From a processor standpoint, that system is fine. You'd want to get an AGP video card though, instead of depending on the the integrated graphics. For WoW, you don't need a bleeding edge video card. My son's system is an AMD XP 1700+ with a GeForce MX440 and runs WoW fine. On the other hand, if you'll also want to run the latest games (HalfLife2, Doom3, etc.), or want to run at the highest resolution and effects level, buy the best video card you can afford. A GeForce 6600GT can be had for under $200.00. You might also consider upgrading the memory for 512MB. Another 256MB stick should only cost you under $30.00 if you shop around. I've seen 512MB for $40.00 with rebates.