Hey fixinbones,
Had a K1200GT earlier this year and wanted a change from BMs so bought a 1 year old 1100S Multi Ducati. Only 3k miles, brilliant red, got the panniers, new screen, chain oiler all ready to fit. Lasted 1/2 hour at home before taken back in dealer van, wouldn't start. After 1 week came back, used for 4 days, nearly stranded twice and back in a van to the dealer for 5 weeks. Then agreed with dealer to take back and they paid back all monies for everything. Straight down to local BM dealer, test ride on 800GS and deal done.
What have I learnt? Multi great to ride, great sound, poor seat and screen, I only wish it didn't have the electrical gremlins as the bike dynamics are really good. Local Duc dealer really good and did the honorable thing. BM also great to ride, not bad sound, poor seat and screen, and it still goes well after 1600 miles and I wouldn't swap it for anything else now. Yep a few known probs but will be sorted by dealer. Recent MCN report states 50%ish Ducs suffer electrical faults.
All a matter of personal opinion but I thought the Duc had slightly greater presence but I wouldn't put my money there again. This site has plenty of advice for screen and seat mods, in the UK I've had seat completely redone by LICS who put a gel membrane insert in place and the transformation is amazing. I'm told the GS is good 2-up by the 'other half' after a recent trip to Spain, and I would definitely know if it caused problems!
My 2 pennyworth anyway, so hope this helps.
Cheers.