I managed to get hold of a bnib Xrocker gaming chair for my xbox a couple of years ago.
Waste of time and money, the sound is rubbish, the vibrations are unnecessary and it collapsed on one side, making sitting on it wonky- which added to it's already uncomfortablesness. You really would be more comfy sitting in a gt3 class racing car.
I've no experience of any others but after this, i'd just get a nice comfy desk chair or something, I know that I wish I had.