I have a D16RR and a SL also. I will agree with you that the Desmo will probably be the most desired bike in the future, not because it is a better bike but simply because the emotion created by a Moto GP replica for the public. With regard to the sound, performance, and confidence inspiring the SL is hands down the better of the bikes. With the Desmo I put on 8500 street riding miles, including a 2000 mile ride, put it on the track for track days and made 100 passes on the drag strip. It is an emotional tie to that machine. The SL, I have put 6000 miles of street riding including a 3896 mile ride, and on the drag strip. Have not had it out for a track day yet but have put a lot of miles in the twists. At 11,000 rpm the SL sound is beautiful, much sweeter than the Desmo, [lower rpm's I like the desmo GP exhaust note] it does nothing but create confidence in being able to ride it, light, flickable on command, seating position,extremely reliable, and when and if repairs may be needed it doesn't take an arm and a leg to get it done as well as parts are readily available. Engine rebuild for the Desmo is a cool $10,000.00. But you can bet I will do it when necessary as the emotional attachment to a Moto GP replica that I can ride may never occur again. I am glad I did not purchase another Desmo, it was my plan, until I checked out the SL. The SL is spectacular in every way. Lets face it, they are both awesome. We are lucky to have 1 of each so that we can compare / contrast. What a tough day when we have to decide, the Desmo or the SL today. LOLI still like my D16RR way more than my SL, and I bet over time the D16 will be worth more to collectors . Sounds great also. I probably should have bought a second D16 instead of the SL . I guess time will tell.