How much money do you have?

Foundry Networks, Juniper Networks, and Extreme Networks make good stuff.

Cisco products are good for simple switching and routing. Definitely don't get any advanced featureset devices (firewalls, etc.) from them though.

HP makes decent stuff, but their usability is poor, IME. They do have better firewalls than Cisco, though, IMO.

For basic switching and routing, those paragraphs work downward by preference, and probably price, too.

Also, no one ever got fired for buying Cisco products.

Oh, I'd probably also look at a chassis-based solution so that you can have multiple distinct interface types all attached to one backplane.