I appreciate all the feedback guys. Just to further clarify some points: I have basses as varied as a $250 Rogue 6-string (I know, I know -- what can I say?!); '72 Fender Jazz; Line 6 Variax 4-string; Spector 5-string; and now my MK Sig Dlx. I have always treated those first four equally carefully -- regardless of worth, so I haven't had to learn to be more careful with my Alembic. Obviously, if I were traveling on a plane and/or over long distances in a gear-laden car I'd use the HSC.
But I've used gig bags for years without problem and not only is the HSC too heavy, but the hard, unpadded plastic handle also chafes my hand when I have to carry it any appreciable distance and I'm not tall enough to easily keep the case from banging on every single step on typical stairways (I live up 4 flights of stairs). Yeah, such a sad story all around...!
In the original thread I forgot to mention my Alembic is a 5-string with a 35 scale.
How about an adjustable shoulder harness that holds a HSC vertically on your back like a heavy duty gig bag? I'd buy one!
I should also add that I've seen Victor Wooten, Marcus Miller and several other prominent players at gigs and the NAMM show with their basses in gig bags.