In this day of nearly every hardware manufacturer's name on a power supply, the name of PC Power & Cooling probably does not have the impact it did a decade ago, and with their availability at retailers they definitely don't have the mystique they once did. But that does not mean that they aren't still among the very best power supplies in the industry.
I like and believe in PC P&C's philosophy of a single large +12v rail. Other companies make them, including Silverstone, whose power supplies I also really like. As far as modular, I've owned both and it has gotten to the point where I really don't care if a PSU is modular or not.
The Silencer Mk II 750 looks nice, has plenty of rugged connectors, and the cables are long enough for the largest PC case. The PSU comes with a heavy 14ga cord, some wire ties for cable management, and thumbscrews for ease of installation. The Silencer Mk II 750 is 80Plus Silver rated, with efficiency up to 88%.
In my testing, I saw some flutter, but not constant and only .10v. That is pretty much no flutter at all, very nice while running both a Radeon HD 5850 and a Radeon HD 4870 in Crossfire.
The most surprising thing about the Silencer Mk II 750 is the price, it sells for $129.99 at my favorite online retailer. I highly recommend this power supply for any single video card rig, and for SLI up to at least what it is rated for, a pair of GeForce GTX 260s. I imagine it would handle more than that, however.
OCIA.net awards the PC Power & Cooling Silencer Mk II 750 Watt power supply our Gold Seal of Approval.