I might get away with the HH6 as I don't use static IP's for any devices (just DHCP). The big issue I had with it before was needing to regularly reboot due to it becoming unresponsive. Although the front panel light appeared to show it was connected at the time. I obviously want to avoid a router that needs regularly resets as it could further worsen my line profile, which is already banded.
The other issue with the HH6 was the BT Access Control feature not dropping an established connection, only new connections from the prohibited device were prevented. Ironically, I have the same issue with the Hub 5B, although the Hub 5A seemed to work.