Right now I am using amped ua600 usb adapter with a dlink 7dbi antenna 8ft high that is 60ft ft away from linksys wrt54g router. I am getting signal is 78% to 80% link is 100%. If I were to replace the dlink antenna with a 12dbi outdoor omi antenna mounted 20ft high would I notice any increase in signal from the router and pick more networks close by. Would it even be worth it to replace the dlink antenna??