I've searched through the forums, and I've noticed a few threads on the Garment bag topic. Some were as old as 2003! I think this was before the Aeronaut.
My question is, has Tom concidered an Overland Garment Bag? Not a full GB like you would expect with the larger rolling types, but one in which you could hold a sport coat, and a shirt. Maybe one full suit. Since I've discovered Tom Bihn Bags I've started thinking of something along the lines of a compliment to the Aeronaut. That bag looks perfect for short business trips, but I couldn't fit a suit in it; especially if I have my computer stuff along. Since most of the flights I'm on allow 2 pieces of carry on, I've been very careful not to overfill a bag or bring one that's oversized. Which is why I like the Aeronaut. I wanted a bag that could also carry a suit or two, and a shirt or two, but still be capable of coming with me on the plane.
There is one Overland Garment Bag I've looked at, but never had the guts to purchase. It's the Frost River: Overland Garment Bag. It looks almost perfect. I'm sure Tom Bihn could make it better. With the same care to detail, and fabric pallet that you currently have with the other bags in your lineup, it could be a winner!