I think a good D/P bike is a "best" complement to the FJR. While a true sport bike would be a lot of fun, I feel that a D/P works great as a kick-around bike or for adventure touring. I have a '75 XL250 that puts a lot of bugs in my teeth, and gets 50-mpg to boot! I wouldn't mind have a streetable Yamaha WR or perhaps a KTM or Honda. I'm not real keen on the Beemer. That cantilever fork just don't seem right, ya know! I wish they'd bring a Transalp to the states.
Cheers,
FastJR