The T3 sprints are a real comfy beast but for long distance touring would benefit from a better seat, if it hasn't already got one. Corbin is good and still available for that model I think.
The peg positions are sensible, they fit tall riders and pillions well. My son is 6'2'' and is comfortable on the back of my Sprint Sports.
Just to be safe though, take your girl with you and get an idea of comfort before you buy.
As far as other stuff is concerned, there are a few niggly little problems that can crop up from time to time but most are easily rectified. If the bike has been looked after and well serviced, it will be fine. The T3 mill can do big miles before thinking about rebuilds, they are a really solid lump.
If you haven't heard one running before, you may be alarmed, at idle the 885 mill is mechanically quite noisy.

This is normal and everything smooths out as rpm increases.

Torque is beautiful and power adequate for two-up touring with luggage.
There is a dedicated forum on this site for the T3 bikes; that is, pre fuel injection. Dave might move this thread over there and you will receive a lot more advice from people who own the bike you are looking at.
Good luck with your purchase, for the small outlay, you get a whole lot of bike!
Cheers,
Roden