Okay, having received the my 7530 from Zen, I've started setting it up with my Zen login credentials and adjusting IP's to work with my existing home network.
I've discovered that it hass a PPPoE passthrough option. Does that mean that theoretically I can set my Draytek router to make the PPP connection to Zen? I wonder if there's any benefit to doing this rather than just setting up my LAN router's external IP to an exposed host in the Fritzboz.
Downstream 474 Kbps (59.3 KB/sec) 511 Kbps (inc. overheads)
Upstream 245 Kbps (30.6 KB/sec) 264 Kbps (inc. overheads)