Delta is another cheap OEM brand....they're on par with Allied, but still garbage.
Antec, Seasonic, FSP, Corsair, PC Power and Cooling, Silverstone.....those are the brands to look at. The power supply is the absolute worst component to cheap out on. If a cheap power supply fails, you risk losing every component in your computer.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817371029 $45USD
that's the lowest PSU I would recommend. It's rated for 30A on the single 12v rail