If you don't know what it looks like, this could be a long process. Either take a picture of your current PSU with the sticker on the side, or I'll just recommend you a new one anyway.
Alright, recommend a new one, this one is 500 watts, and i don't know if that will be enough for what I want.
No it won't. I'll recommend a graphics card and PSU when I get home.
When do you get home?
PSU: http://www.newegg.com/Product/Product.aspx?Item=N82E16817341049Great quality, high wattage 80+ bronze OCZ PSU. Fully modular awesomeness. Quite a considerably big rebate for you.GPU: http://www.newegg.com/Product/Product.aspx?Item=N82E16814127567Very powerful card, futureproof, overclockable, great cooler, quality brand etc. Also another $25 rebate.Total: $600 without rebates ($550 after rebates).