Dibond or aluminium: which is the best substrate for mounting?

“Aluminium is the most durable on every count: it is our recommendation for maximum quality (prints we mounted on aluminium in 1990 haven't budged). Dibond is very stable and of very good quality, but more fragile than aluminium during handling. As for Forex and Kapa, we do not recommend them: they are unstable materials, however cheap.”