Cat - for the record, I agree that a subwoofer solves many problems. And for the record, Jim also agreed, but we weren't ready to address subwoofers at that time in our development and, especially then, subwoofers were routinely badly implemented. My reason to keep it in the R series is a tribute to history, the integrated solution at the time.
Note that sans EQ, the sealed bass rollout of 12dB/octave will behave very well with bass management systems.