Prior to my present 1200 C I had an 01 Heritage Classic and then I had an 02 BMW R 1150 RT. When I bought the Sportster my plan was for it to be a companion bike to the BMW but after several months I realized I never rode the Beemer anymore and so I sold it. What touring I do I do solo and with Harley leather bags and a larger bag tied on the passenger seat to my mini-rail sissy bar I can carry all that I need. I would not consider a Sportster for any two up touring.
My dad rides my Sportsteroften even though he has an Electra Glide Classic. He's claiming he needs Stage 1 on his bike now because he rides mine so much he says it "ain't right" when he's got that nice 'Glide in the garage...