I note that the Nexus7 appears to currently be a best buy. Bikeparts.com lists it for $136 + shipping and Niagara has it listed on Amazon for only a few bucks more. The listings indicate that it is a full kit with everything except the shifter & optional roller brake. Looks like a reasonably good buy to me. Both listings note it is the SG-7R46 model, roller brake compatible. A check of the Shimano Europe web site shows that this is the current model that they list.