I just recently bought a Dell Inspiron e1505 laptop with 1.66MHz Core Duo, 1 gig 533mhz ram, 100 gig Hard drive, and ATI x1400 video chip. It will play WoW excellent and I paid under $1k for it with back pack. I was going to get the MSI 1039, which has the better graphics chip (ATI x1600) than the one I have, but it wasn't available when I ordered this one. Last it was stated before, you can go to several online sites to see what you can get for $1300, just make sure you are getting a dedicated video chip with your laptop. Some of the older chips will do fine also. The ATI x700 is one of them, seems to be still holding it's own. If you like/prefer nVidia, I would recommend at least the 6600 go model or newer (bigger the number the newer it is, generally, ie. 6700, 6800, etc.).
Make sure you get a wireless card or possibly the bluetooth wireless card combo. If you have a cell phone with bluetooth capability, then you might have a chance to connect to it wirelessly (not critical though for most people).
One final note.. If you want a 17" screen and a decent video chip, than you might want to look at the Dell e1705 laptop with the nVidia 7900 graphics chip. It can be had (with online coupon) for around the $1300 price range. Google the coupon (punch in "Dell laptop coupons") and you will find the coupon code online, which you just cut/paste at the checkout screen to get the discount.
Dell's aren't always the best situation for individuals, but they do have respectable systems if you do your homework. I hope that this helps you, I know I did ALOT of research for pricing before I purchased my current laptop.