I've used the MOVEN system: http://www.xsens.com/en/general/mvn And it works well - but it's nowhere near as cheap as using kinect. You'll have a hard time finding any motion capture that's in the same price range as kinect.
As far as i remember it's possible to use 2 Kinects for that and it works pretty good. You could try writing to Quantm Berlin the Game Design education there uses the 2 Kinect technology for their mocaps. (https://berlin.sae.edu/en-gb/course/9740/Game_Art_and_3D_Animation)
Somebody knows which kind of affordable system is able to do mocap, to control a biped in real time? I've tried one kinect but generally linking the nodes to the bones is hell and movement is not so fluid.
Realtime on a biped? I don't think there is motion capture that would tie themselves to one application and one rig, most are 3rd party applications that export to all of the major packages, 3dsmax/biped being a very common one. If they feed into anything in realtime it would be MotionBuilder which has a lot of tools to…