Best Upgrade option for HP Desktop?

[The Halo Don]

What would be the best upgrade option for an HP p6774y?

Here's my PC:
http://www.bestbuy.com/site/HP+-+Pavilion+Desktop+/+AMD+Phenom%26%23153%3B+II+Processor+/+6GB+Memory+/+1TB+Hard+Drive/1757113.p?id=1218289377288&skuId=1757113&st=p6774y&cp=1&lp=1

Also it only has a 250w PSU that I dont look to upgrading just yet.

I want to get the best bang for my buck on this GPU upgrade, I was thinking of a 5570 1 gb, but maybe I could get something better?


Games I intend to play:
Left 4 Dead 1 & 2
Team Fortress 2
Fear 2
BF: Bad Company 2

My Native resolution is 1280x1024, but I understand on games like Bad Company 2 I will need to play on much lower resolutions.

 

[Gulli]

What would be the best upgrade option for an HP p6774y?

Here's my PC:
http://www.bestbuy.com/site/HP+-+Pavilion+Desktop+/+AMD+Phenom%26%23153%3B+II+Processor+/+6GB+Memory+/+1TB+Hard+Drive/1757113.p?id=1218289377288&skuId=1757113&st=p6774y&cp=1&lp=1

Also it only has a 250w PSU that I dont look to upgrading just yet.

I want to get the best bang for my buck on this GPU upgrade, I was thinking of a 5570 1 gb, but maybe I could get something better?


Games I intend to play:
Left 4 Dead 1 & 2
Team Fortress 2
Fear 2
BF: Bad Company 2

My Native resolution is 1280x1024, but I understand on games like Bad Company 2 I will need to play on much lower resolutions.

At that resolution the HD 5570 can play those games maxed out, or nearly maxed out, and it's the most powerful card you can have with that PSU, if at that. Can you please give me the number of amps under "12V" of the power supply?

 

[The Halo Don]

Do you think there is another way of doing it besides taking the side panel off?

 

[computernugget]

i think thats gonna be your best choice. unless you get the 6570, as for checking the amps, i dont know if there is another way, unless.....ima look up the manuals online see what i find.

edit: im sorry bro, the netbook im using doesnt have a pdf viewer and its gonna take me 2 hours to download the adobe reader.

 

[The Halo Don]

Best answer selected by The Halo Don.