I finally bought one (see profile). A friend used to work for Dawkes, and I asked him to get me one and he said, No, you've got enough on your plate.
It's only an Eastar EFL-1 (£66 incl. delivery). Good for the money, but probably a waste in the long run. The violin is certainly a thousand times more important to me. It sounds a bit noisy, but then so does the violin up close. I need to record myself to see if the hisses disappear at a distance.