I recently bought a black vinyl 2 up Tour IST seat, $315, from Dennis Kirk, part number
FA-DGE-0305, and I liked it. The problem with it, and I returned it as the reason, is the seat left a gap where it meets the tank console. On the bike it seemed to fit well, when you sat on it, it moved the seat ever so slightly back and a gap of about an inch existed between it and the tank console. Big enough that if it rained water would enter into that area and it looked wrong.
Now, I have searched the world, LOL, for a comfortable seat as I'm 6' and this one almost worked except for that reason. It was combortable, not as much as my HD Tall Boy though and for those 2 reasons it was returned. For me, the search continues....hope this helped you.