My main finger-picking instrument for a while has been my 12-string Fylde Falstaff. I have a capo at 2nd fret and tune to concert from there (dropped-D tuning). The lower tension is not strictly necessary, I just prefer the slack feeling - bending notes is even possible. I usually use Martin Lights or Extra Lights if I can't find those. Tuning and intonation are good all the way up the neck. The guitar has a tremendous ring to it, sustains for ages. Roger used to make a smaller twelve-string with a cutaway body which I liked many years ago. Haven't seen one of those for some time (Don't know the model). I could do with a slightly smaller-bodied guitar these days - maybe when my ship comes in!
Ross