I wouldnt' recommend teh Rosewill Green series just yet. I've only seen 1 review and that was for the 630w version and the reviewer stated:
This power supply is manufactured by ATNG. Interesting enough internally this power supply uses the same design from another unit from Rosewill that we’ve already tested, Performance 650 W, which for some reason is not listed on Rosewill’s website. In our tests with Performance 650 W we discovered that it could not deliver its labeled power at high temperatures. It seems that Rosewill got the same power supply, put components with higher current limits on the secondary and reduced its labeled power (and stating that it can deliver 630 W at 40º C), selling it with a different name.
Link to review: http://www.hardwaresecrets.com/article/881
So I'm not sold on them yet. I'll have to have more reviews to decide if I'm buying them for my systems.
Well when price is a concern (and it often is) buying the absolute best isn't always an option. Recommending something that is at least close (when there aren't more reviews yet) is better than having people ignore you and just buying, say, http://www.newegg.com/Product/Product.aspx?Item=N82E168...
which, let's be honest here, most people end up with stuff like that. Especially when people get PSU + case combos.
Now besides all that I saw in some power supply forums where people were talking about it and the manufacturers were pretty good. I got the 530 watt for $40 when it was on sale and it's done a good job in 3 different computers.
Oh I'm not saying the Rosewill is a bad PSU, but I've had my run-ins with cheap PSU's, so I won't recommend them (Raidmax, Logisys, Apevia, etc.). The BFG is a good buy for the $ right now, so that is what I'd recommend for ~$50
Don't forget to check all the drop downs and include capacitor aging and other items. When ya done, I like to multiply by 1.2 to 1.5 so that I am operating in the most efficient range and I haven't tripped the fan onto hi speed.
Then I take the answer and go to the Editor's Choice List here.....
....look at the list, read the on site review, then head over to jonnyguru.com for a second opinion. Then off to newegg to see if it's affortdable for the build in question....if not back to the silentpcreview.com site and drop down to the "Recommended List"....."rinse and repeat" as above.