If the printer has ethernet, it doesn't matter who you use. But I don't understand... right now, your iMac gets internet access through a Belkin wireless router and is plugged with an ethernet cable to the printer? You should just be able to move the printer to the Belkin right now, if you want to. You may have to switch the printer setup to IP-based printing, but it should be very easy. You could certainly also get another router, plug the printer into it, and then have that router join the existing network, if you want the printer on the network but you don't want it where the Belkin is now.