I'd recomend the Cinch, I have loved mine since I purchased it 3 or so years ago. But agree with Dylans point, when weighted it can heavy to unlock.
The other thing is at the moment the cinch seems bloomin pricey to buy compared to other belay devices (Think conversion rate at the time made mine quite cheap). So you might as well wait for the Gri-gri 2 or keep hunting