The $4670 is a significant improvement over the 4650, for $10 more.
O my mistake I think I meant to say 4670 not 4650. Anyways http://www.newegg.com/Product/Product.aspx?Item=N82E16814161262 or http://www.newegg.com/Product/Product.aspx?Item=N82E16814102820. Or do you have another suggestion for another brand.
I like the saphire, good pricing and decent quality.
The brand won't matter too much, there are few "horrible" brands, going with the cheapest won't kill your computer, after all, ATI is ultimately the one making the chip.
Stay away from Basiq line of antec. The higher end antecs are good to excellent, but the basiqs are typically CWT based, which CWT's lower end is terrible.
Too late already bought the Basiq Antec :/
The Basiqs are not CWT-made but are FSP and Delta units, and while they lack the high efficiency of the Earthwatts units (now also made by Delta; some are still Seasonic but getting rarer by the minute), they are still a fantastic choice for a budget or mid-range system. Certainly much better than most other units in the same price range.
And FYI, CWT does not make any PSUs for Antec anymore. Especially not after the fiasco over the use of Fuhjyyu caps in the CWT-produced SmartPower 2.0 and TruePower 2.0 series, among others.