Could I attach a speaker switch box to this?
I believe you can add a speaker switch box to virtually any receiver or amplifier as they all have "outs" (ports or speaker attachments for speaker cable) on the back panel. If you are planning to run more than one set of stereo speakers from the receiver, just be sure that you don't drive (raise the volume level) too high as too many channels (speakers) from one source can be hard or even destructive on a receiver or amplifier if you drive them too hard. Good luck with the purchase should decide to do so. It looks like it has a number of real modern conveniences.