Well, that all depends...
The key to water cooling is to try and get just enough radiator space to cool everything that you want cooled, while being able to maintain a low fan speed, so that you can get it as silent as possible. If you get it right, then yes, the temps in the review are close to what you can expect, if you have a room which is maintained at 20 degrees.
Theoretically, yes the 360 MIGHT be enough to cool everything, but it looks like you want to overclock the cpu, and the GPU. Because of that, I do not feel comfortable in giving you a definite yes on this. You would also have no overhead if were to decide later to add a block, or crank up the over clocks.
Personally, I would still get the additional 240mm rad, extra cooling overhead covers any overclocking, and also provides room to expand should you wish to.
Worst case: Suck it and see how you go. Get the 360, try it out, and monitor the temps. If you're not happy with them, get the 240, and see what happens to them.
Just remember, the temps ARE reliant upon the ambient temperature, as well as the overclock and water flow speed.
What we've got here is; failure to communicate...