I would feel VERY nervous putting a $3500 investment into a soft(ish) lightweight case. My ATA has had speakers dropped on it, survived a 90mph crash (lady in a minivan plowed into the back of us!) and has protected my nearly six year old G70 without breaking a sweat. Something that few ABS cases could do, I'm sure.
I virtually NEVER have to cold lift my case with arranger, everything is dollies and leverage. I am afraid I would be a nervous wreck trying to transport my G70 in something I KNEW (even if only in the back of my mind) was one dropped speaker away from destruction!
Not too many of us can afford a backup $3500+ arranger. Don't short change your case...