3Com Superstack 2s are good. We use them at my work along with Superstack 3s and Cisco switches. I see no difference between them. If a port if bad, then leave that port unused and you should be okay. Managable/unmanagable isn't really necessary except in a business environment, so that the network people (like me) can do VLANs, port spanning and other nice things to help secure the network (and annoy the users all at the same time

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Sean