You do not need to attach directly to your router. If you have the PC on your local network than plug the HD Homerun into port on the switch. If you are using a wireless connection to the PC then you likely have an available Ethernet port on the PC. You only need the HD Homerun on the lan if you want to share it across the network. A PC not attached to the local network can still talk directly to the HD Homerun with an Ethernet cable directly between the PC and the HD Homerun. I don't have any idea what you or where you have it but there is no need to buy another tuner if you have an HD Homerun you have complete flexibility in how you configure it.
Samsung 78" JS8600, Mits WD-92840 43" Samsung 43ku7000 - Lumagen Radiance XS, Martin Logan Motion 40s, Ascend Sierra 2s
58" Panny Plasma -DVDO DUO, Usher S520, JBL HLS-610, Definitive SM45, MusicHall Marimba