This Tier-T PSU is $75 after $10 MIR: http://www.newegg.com/Product/Product.aspx?Item=N82E16817812002
mushkin 550200 ATX12V 550W Power Supply 115/ 230 V cUL,CE,CB,FCC - Retail

I've used two of them. They are quiet and stable. One downside is that although each +12V rail is rated for 20A, combined they're only good for 28A, which seems a bit low.
Also, each cable for SATA drives has 4 connectors on it. If you only have one or two such drives in your system, you'll still have extra cable hanging off them.
The next modular PSU I buy will probably be a Corsair, but this was/is not a bad PSU. Check around though, sometimes other places have better prices on PSUs than Newegg.
 

beurling

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Jan 2, 2008
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620HX is what I've got in my rig and it has been great to me. All cables were long enough to manage and I can't even hear the thing. I can only imagine the 520HX being just as good if you dont need the extra 100W.