Koffee, thanks. I definitely want the Sakkit for serious touring, but was wondering if it would be the best answer for trips where I just want to get in some day rides, or add on a short tour, and thus, don't need to carry scads of gear. Setup and teardown, since I'd have to remove racks, would be larger than with a BF.
So, my real question is whether getting the BF in addition to the Sakkit makes sense (and dropping the couplers from the Sakkit), or if I should try to make the Sakkit serve several purposes.