Which PSU to get?

[J87X]

I need it for a core 2 quad, 3 hard drives, etc.... Will be OCing. And the latest single video cards (no plans for sli/crossfire). I will probably want to upgrade to the newest GPUs during the next 2 - 3 years.

OCZ StealthXStream OCZ600SXS 600W $65 after promo code

Antec EA650 650W

Antec True Power Trio TP3-650 650W

PC Power and Cooling S75CF Silencer 750W

CORSAIR 750w

Suggestions?

 

[Asmodeus801]

Out of those, I'd probably go with the PC P&C 750. Their support is kinda slacking at times, but they do make one really good PSU.

 

[MrWizard6600]

OCZ StealthXStream OCZ600SXS 600W $65 after promo code

The StealthXstream 600 and 700W units are elipson based. This perticular platform is known for breaking 150mV ripple on the 12V when you push it up to full load, hitting 120mV (max spec) somewhere around 75% load. Not a good unit.

Antec EA650 650W

The Earthwatts 650 is a corsair unit, its quiet, maintains good efficiency, but doesnt offer anything to write home about. Its clean cheap power.
review

Antec True Power Trio TP3-650 650W

This thing isnt too bad until it dies. It seems to have trouble with heat. This units 3 12V rails are actually one single 12V rail, which is usually not a good idea because it means your pulling a helluva lot of current from a single source, which frequently causes heat problems.
review

PC Power and Cooling S75CF Silencer 750W

This is another Seasonic built unit, its definatly an old unit but offers very tight voltages, on Jonnys infamous 12V crossload (60A on the 12V rail for a 750W unit), this thing managed 11.86V, which is superb. Efficiency is almost always above 80%, ripple is well under 10mV for the 3.3 and 5V rails, and peaks at about 50mV for the 12V rail.
review

CORSAIR 750w

This is the most modern of the PSUs you listed. Its a cheap, well built CWT. At full load it will push 100mV down the 12V rails, but thats still withen spec and considering the rest of the figures it gives you I think its worth forgiving: 83-85% efficiency at typical load, and it has one of the smallest Vdroops I've ever seen on a 12V rail: from ~12.15V, to ~12.10V. the 5V and 3.3V rails are equally as impressive.
review

You cant go wrong with the corsair or the PC P&C. The Earthwatts performance is directly perportional to the money you save. The other unit worth mentioning is the BFG LS 680W, (review) or ES 800W if you want to step up. NCIX had the 680W on for $70 after a $20 MIR a days ago but that deal seems to be done, still, its worth mentioning.
edit: found a $25 (CAD?~$20 US) MIR [PDF] thats good "channel wide". Dont know if that means shipping to US. Its linked on the canadian page but not on the american one. It might be worth it to pickup this and try for the MIR. If you dont get it, you didnt do any worse than you could have with the Corsair or PC P&C. If you do, then you got a pretty good deal.

Power supply wattage is the 2nd biggest scam I've ever seen in consumer space (the 1st being HDMI cabling $30/ft from bestbuy, $2/ft from monoprice.com!). It seems to me that a 750W is the last thing you'll ever need: it will happily power two GTX 295s or two HD4870X2s. A 650W would do the same but without the breathing room.

 

[J87X]

Do you know which one is more quiet, the corsair or the pc power & cooling?

 

[J87X]

Actually does that BFG 680W rebate work with buy.com? They have it for $78 shipped

 

[Zero82z]

The Earthwatts 650 is a corsair unit

Uh, no. It's a Delta.

This units 3 12V rails are actually one single 12V rail, which is usually not a good idea because it means your pulling a helluva lot of current from a single source, which frequently causes heat problems.

Not true. The TP3 series is mediocre, but there are no real disadvantages to using a single-rail distribution in a PSU. It is purely a design choice. Many quality PSUs like all of Corsair's units (excluding the HX1000), most of PCP&C's PSUs, Antec's NeoPower line, and Thermaltake's ToughPower series (excluding the 1000W and 1200W models) are single-rail and perform extremely well and within reasonable heat, noise, and power quality levels.

Do you know which one is more quiet, the corsair or the pc power & cooling?

The Corsair is quieter.