Looking to upgrade my system.

Hi there, I currently built my own PC last year, and I am looking to upgrade it within the next 3 months, here are the current specs.

Mobo: http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Processor:

Proc: http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Ram: http://www.amazon.com/Kingston-ValueRAM-PC3-10600-KVR13...

PSU: http://www.walmart.com/ip/Coolmax-V-500-Series-500W-120...

I used my old hard drive, dvd-rom and case, aswell as my monitor, speakers, kb and mouse.

I got the complete PC for like $140 so it wasn't bad.

I will have another $120/150 to spend.

I found a good deal on ram here:

http://www.newegg.com/Product/Product.aspx?Item=N82E168... it's 8GB so that would max out my mobo at a cheap price.

Proc: http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Graphics card: http://www.newegg.com/Product/Product.aspx?Item=N82E168...

I like to play games such as WOW, COD 4, and would like to play the next part but this built in GPU lags, Guild Wars, games like that. I also use Photoshop, Skype, and like to have Skype, Photoshop and such up while playing games, and while it works most of the time, sometimes it does crash or get wayyyyyyyy to slow to be usable without a restart.

This upgrade would cost me about $130, I think that is a decent price for this stuff, and would give me a lot more performance, then what I currently have.

What do you guys think? If you can think of a better upgrade, please do let me know, I would love to hear it, keep in mind I'm only 15, so can't spend anymore then this.  

Regards,
Eddie.