I'm running OpenWRT on a TP-Link TL-WR841N/ND v8 and the LuCI interface that comes out of box is vastly better (cleaner and more feature-full) than the majority of consumer router interfaces I've encountered. In particular, the realtime graph of current connections!

You can likely set your ADSL modem into "bridge mode" and put a user-flashable device between that and your network. Once you get NBN you just connect the WAN port to the NBN termination box and you'll be getting DHCP from your ISP.