[Ecio78]

Yes i was exactly thinking about stacking two independent switches (i've done it with Cisco 3750 but you can do it also with other brands). The only problem could be related to the fact that doing this kind of stack you're now dealing with one "logical" system so if the firmware is bugged or someone issues the wrong command, you can have a single point of failure (but this could happen also if an HA system goes wrong by itself or because of you)