I picked up the Strand double strap briefcase and I love it more each time I use it. The quality of it is great; so much so that I considered getting the matching duffle bag. But I held out because I don't take too many road trips, and it is far too nice to check in at the airport. Nice items, both of them.
I was thinking of buying the Strand Duffel for myself during this current sale (I already own a great Saddleback briefcase so I don't need the Strand double strap briefcase for myself but can appreciate the great quality of both items). But, like you, I probably wouldn't put it to use enough to justify the cost.