I lowered my Dr650 same as RJ. Seat was lower than the RX3, and with the soft stock suspension, with rider sag, lowers it even more when mounted.
The DR suspension was more kindly to my aging backbone than the RX3 ever was, even with the upgraded shock.
Another bike I should have kept....
BTW, RJ, I never had trouble with the tire rubbing with conservative riding (Shinko 705s)
jb