Another Corsair product that left me quite satisfied, not only by its performance but also by its nice design. The updated GS series is still produced by the same OEM, Channel Well Technology, which also made the older models but it is based on a much improved platform. On top of that the Corsair GS800 registered high efficiency and although it is equipped with a pretty strong fan that can get noisy at full speed, at low load it goes fanless and you have to stress it really hard to seriously increase the fan's speed.
The LED lighting of the fan looks nice if you have a windowed case and the good thing is that you can turn if off it if you want to enter stealth mode, as Corsair calls it. Moving to the downsides I spotted, there are two major ones, with the first being the single EPS connector and the other is the rather stiff price which brings puts it in the same category as the modular Corsair and Thermaltake units, with the latter using exactly the same platform. In to my opinion Corsair should drop the price by $10-20 to make it more competitive.

To conclude, if you fancy LED lighting, want a PSU with good performance and high efficiency at typical loads and don't mind the absence of modular cables then you can safely consider the new Corsair GS800. It is also backed by Corsair's excellent support, however a longer warranty would be ideal. Now if you want a modular unit with similar capacity you can get yourself an 750W modular PSU, which uses the same platform from CWT and costs about ten bucks less. It surely lacks the LED fan and the semi-fanless operation at low loads but has modular cables, so the choice is yours, depending on your needs.