in regards to dragna's post, RM1k if only for WoW is a bit too much yeah, but theres a possibility starcraft 2 and diablo 3 comes out and you find your computer lacking stuff, so its best to upgrade all the way, as much as possible.
Anyways, this may help your decision:
http://www.worldofwarcraft.com/wrath/faq.xmlAnd to make it simple for you, I'll copy paste the important points :
PC System Requirements
OS: Windows XP / Windows Vista (with latest Service Packs)
Processor:
Minimum: Intel Pentium 4 1.3 GHz or AMD Athlon XP 1500+
Recommended: Dual-core processor, such as the Intel Pentium D or AMD Athlon 64 X2
Memory:
Minimum: 512 MB RAM (1GB for Vista users)
Recommended: 1 GB RAM (2 GB for Vista users)
Video:
Minimum: 3D graphics processor with Hardware Transform and Lighting with 32 MB VRAM Such as an ATI Radeon 7200 or NVIDIA GeForce 2 class card or better
Recommended: 3D graphics processor with Vertex and Pixel Shader capability with 128 MB VRAM Such as an ATI Radeon X1600 or NVIDIA GeForce 7600 GT class card or better
Sound: DirectX-compatible sound card or motherboard sound capability
Mac System Requirements
OS: Mac OS X 10.4.11 or newer
Processor:
Minimum: PowerPC G5 1.6 GHz or Intel Core Duo processor
Recommended: Intel 1.8GHz processor or better
Memory:
Minimum: 1 GB RAM
Recommended: 2 GB RAM
Video:
Minimum: 3D graphics processor with Hardware Transform and Lighting with 64 MB VRAM Such as an ATI Radeon 9600 or NVIDIA GeForce Ti 4600 class card or better
Recommended: 3D graphics processor with Vertex and Pixel Shader capability with 128 MB VRAM Such as an ATI Radeon X1600 or NVIDIA 7600 class card or better
All Platforms
Controls: A keyboard and mouse are required. Input devices other than a mouse and keyboard are not supported.
Connectivity: You must have an active broadband Internet connection to play.
Mouse: Multi-button mouse with scroll wheel recommended.
Hard Drive Space: 15 GB free hard drive space
Do your own calculations from here, but I think RM1k isn't enough.. Maybe pinjam some from friends/parents(stay away from loan sharks ya..

) and push that to 2k or something... Then you prolly won't need to upgrade for when other games come out as well..
This post has been edited by lolskrub: Oct 28 2008, 11:15 AM