Building gaming PC for 375$

i am looking to build a gaming PC that will run world of warcraft smoothly. i am on a tight budget so id like to spend between 300 and 400 $$.i have the essentials(mouse,keyboard,monitor,speakers). here are the system requirements for the game i nwant to play.

Minimum System Requirements

Windows® System XP/XP64/Vista/Vista64/7** OS (with the latest Service Packs or updates):

- Intel Pentium 4 1.3 GHz or AMD Athlon XP 1500+
- 1 GB or more of RAM
- NVIDIA® GeForce® FX or ATI Radeon™ 9500 video card or better
- 25.0 GB available HD space
- 4X DVD-ROM drive (Downloadable Installer also available)
- Broadband Internet connection
- Keyboard/mouse

id like to run this game smooth.

now here are the parts i have come up with .after 2 days of research. and help from others.

motherboard
http://www.newegg.com/Product/Prod [...] 6813128454
processor
http://www.newegg.com/Product/Prod [...] 6819103871
video card
http://computershopper.com/compone [...] on-hd-5670
power
http://www.newegg.com/Product/Prod [...] 63938&SID=
memory
http://www.newegg.com/Product/Prod [...] 6820231396
case
http://www.newegg.com/Product/Product.aspx?Item=N82E168...


i dont know if the computer cases with built in PSU are reliable for playing games but if you think they are reliable, that will save me a good 50$ on my build



and one more thing i need quad core because i plan on upgrading this computer in the future

thanks in advance guys