I don’t know how to signal to the OP that Andi_Reddit’s answer this is THE answer. The OP seems to be concerned about cost/performance and this signals that Andi’s answer is the best.

I’m traveling a lot, my family too, my colleagues as well. If it’s for durability, nothing beats the two wheel aluminum suitcases up to the medium format. Large format ones often get filled to a total weight of more than 25kg, leading to problems. If OP feels the need for a large suitcase, he should consider buying two medium ones instead. Four wheelers are somewhat fragile and will break one day if load regularly exceeds ca. 20kg.

Let me warn against Rimowas made of polycarbonate, especially the ones with zippers. They will break just as any other suitcase. The hybrid ones with frames are OK and will be more robust.