Help with choosing a PSU

[tunarolls]

Hello guys, this is my first time posting and I hope I posted this thread in the right section. It's also my first time building a PC so I would like to ask if I'm building it right. Note that I'm on a very tight budget and this would only be used on mid-tier stuff so bear with me.

Here are the specs:
CPU: core i3-3220
GPU: HIS HD 7770 IceQ X 1gb/128bit ddr5
HDD: 500gb WDC Caviar Blue sata3
MB: Asrock H77M
casing: NZXT Source 210 Elite
ram: G.Skill RipJaws X 2x4gb ddr3-1333
optical drive: Liteon 24x Sata
PSU: ???

Any suggestions on what PSU I should buy with these specs? Recommendations to the specs? Please halp.

edit: I'm mainly playing with resolutions 1366x768 or lower, if that would help determining if my specs are overkill and is a huge waste of money.

 

[willyroc]

This is the best PSU below $30:

Corsair CX430V2
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139026

If you are looking for a bit more wattage:

Azza 500W
http://www.newegg.com/Product/Product.aspx?Item=N82E16817517001

 

[prototype18]

For that system Antec VP-450W would be the best. Its 31$ on ncix and can deliver more W.

Get that before it gets out of stock.

And that 7770 will do very good at that resolution.As you have it use it to the max.

Good Luck !

 

[Scott_D_Bowen]

"I'm on a very tight budget"
- Then why are you looking at NZXT cases?

EDIT: Disregard, they're only $60 without a PSU.

- Thank you, it's not often I gain knowledge from these forums.