First time Build for ~$500

Hi,
I have helped some of my friends with setting up computers that they built, but this will be my first time actually going through the whole process myself. I was hoping someone could help me with a build that fits my needs without costing a ton.
Thanks for any help!

Approximate Purchase Date: e.g.: I plan on finishing the build before the end of the summer for the up coming semester of college. The sooner the better though.

Budget Range:I would like to keep the build very cheap under $500

System Usage from Most to Least Important: I use alot of software that is video intensive (Parametric Modeling software), I also need it to run long MatLab files. I like to play games as well, but mostly just web based ones that arent as intensive.

Are you buying a monitor: I have a Samsung HD TV That I have been using as a monitor with my Laptop (HDMI)



Parts to Upgrade: Full New Build

Do you need to buy OS: I can get widows 7 very cheap through the college software website

Preferred Website(s) for Parts: I dont care that much. Newegg is always great, but no preference really.

Location: College Station, TX

Parts Preferences: I prefer Intel Processors to AMD

Overclocking: Probably not, unless advised otherwise

SLI or Crossfire: Dont know much about this so advice would be nice

Your Monitor Resolution: Im not sure, I dont have it with me right now. I can find out later if this is important.

Additional Comments: Here is a list of software I use: MatLab, SolidWorks, Autodesk Inventor, LS-PrePost, Altair Hypermesh.

And Most Importantly, Why Are You Upgrading: Currently I have a really cheap gateway laptop that was not very good when I got it in '09 refurbished. Its basically useless for doing anything for school, and its becoming nessecary for an upgrade.


So far I think that I want to use the following, but I could be easily persuaded. I have been research to learn about what I should pick.

CPU: Intel i3 2120
Motherboard: ASRock Z68 Extreme3

Any ideas on where I should go from here?