What is the best PSU for HD 7870?

[Progaine]

Hi,
So I've been thinking about getting the iceQ HD 7870 (http://www.newegg.ca/Product/Product.aspx?Item=N82E16814161404) and so I'm going to have to buy a new PSU.

I've already limited my choices, but I'm open to any other choices.

Rosewill CAPSTONE-450 450W: http://www.newegg.ca/Product/Product.aspx?Item=N82E16817182066

Rosewill RG530-S12 530W: http://www.newegg.ca/Product/Product.aspx?Item=N82E16817182199&Tpk=RG530-S12%20530W

Antec NEO ECO 520C 520W: http://www.newegg.ca/Product/Product.aspx?Item=N82E16817371030

Keep in mind that the PSU will have to power a HD 7870 inside of this computer(i3 2120): http://h10025.www1.hp.com/ewfrf/wc/document?docname=c03038372&tmp_track_link=ot_faqs/top_issues/en_us/c03038372/loc:3&cc=us&dlc=en&lc=en&product=5178884#N1195

Thank you in advance for any of your help!

PS: It shouldn't exceed 70 CAD and it can be from any Canadian retailer.

 

[Silvune]

The CAPSTONE-450 is undoubtedly the best out of the ones you've listed and is probably better than any other unit you could consider.

Have you looked inside your case to see how much space you have for a PSU?
I'm asking because you will need ~2cm of extra space for the CAPSTONE-450 compared to the one listed on HP's website.

 

[Progaine]

Best answer selected by Progaine.