I've ordered the pannier rack of Hepco&Becker, the Lock-it system. Same quality as the conventional racks by H&B, but you can take it off rather easily when you don't want to use it. Partnumbers:
Lock-it rack: 650.4526-0001
Upper luggage rack: 650.4526-0101
Adapter kit for alu panniers: 700.201
The pannier rack costs about 225,- euro's, delivery aug/sept. Link:
www.hepco-becker.de . Greetz, Hans.