Well, I'm looking to by a limbo (once I decide which size), for exactly the balance of reasons you mention.
I think it has the best balance between strength and light weight, ie it fits nicely between the Salsa and the Topas.
The two damaged suitcases I have had (samsonite ABS plastic) have both been damaged by dropping on the corner, which I think the Limbo protects well against. Also, I would think (hope?) that the split-polycarbonate problem might be less likely due to the aluminium frame.
However, I still have to get over the fact that my new $700 suitcase could get broken on its first trip, something I'm not altogether reconciled with.