The Novint XIO looks very interesting indeed. I have the Novint Falcon and I can say its a top quality product. If the XIO has the same build quality as the the Falcon that certainly won’t be an issue.
I’ve done some Half-Life2, Team-fortress and Dead-Space 2 on the Falcon and the drivers are 99%. Dead Space 2 is already scarey enough, but add that gun recoil and geez it has you sweating. Will definately be keeping an eye on this product.