Sounds like a simular situation I was in back in '94. I had my '92 Katana 750 for a couple of years and really enjoyed it, but was really eagar to do some FS roads and trails. The KLR 'Barbie' has been a great bike from everything such as single track to long touring rides. My wife likes to ride mostly on FS roads and mild trails. The longest ride she has taken with me on pavement, from point to point, with 1 stop, was only a 2 hour ride. I figure if you make enough stops, and maybe swap out the already good seat for a better one, it could make a nice touring machine for ya. Plus, she won't have to lean forward.
Keep Loving Rides!