I have both the Gitzo CF and a Ries...the ries with legs that come apart so it packs small.

At first glance, the Ries seems a lot less sturdy because of those jointed legs, but interestingly once the legs are out and the camera is on, it is very steady.

In fact I find myself using it a lot more than the Gitzo because it seems significantly less prone to vibration, and is actually easier to maneuver in the field. The downsides are the weight compared to a CF Gitzo, and I (found out the hard way) you have to check it at the airport because of the spiked feet.