I am planning to put a rotor on my loop. Unlike yours, mine is unshielded, and from time to time I have to go out and manually rotate it to minimize noise pickup. For a while I was thinking about using one of the sat dish rotors; the single coax interface cable seemed like a good idea.
Instead of this I have decided to go with a light duty conventional rotor, the hy-gain AR-303. The reason for going this way is the fact that as long as I have to do a cable run to it, I could run an 8 wire instead of the 3 wire cable which the rotor requires. This would bring a few extra conductors to the loop which would make it possible to implement other functionality.
Either rotor would probably do the job. The sat dish rotor has simpler interface cable requirements, the hy-gain looks like an easier mount with better potential physical balance so that the mast (PVC pipe) would not need additional support such as guying.
The hy-gain runs around $90; the cable run out to it will actually cost more than the rotor.
Hope this helps!