The BK's are very nice, carried by STM, USAK, Stillwater, and others. I have a Rob Roy, which I think could have the tassels removed. That one and the Inverness have the most capacity of the BK's, so may be the most practical for day to day use.

Consider also the SWK nylon cargo sporran ("Nightstalker"), which has 2 compartments, tassels which can be removed, and is eminently practical. It has a less traditional look, to those accustomed to highland wear; the general public won't know the difference.