The RICAS is a huge rig, so not for the small of frame. Or indeed the medium sized person really, I'd only consider it if you're around the L/XL size for shirts.
I've got a WAS DCS in multicam, the build quality is outstanding, the design and functionality is excellent. It wasn't my first choice to buy, but I wouldn't switch back now.
CK is right, the RICAS is a big rig, the DCS is much smaller and very adjustable.