Are there any good VDSL modems people recommend for small business?

We have a VDSL connection here in Australia, over the NBN (National Broadband Network). Rated speed is 100 Mbps down, and 40 Mbps up.

The ISP has supplied us with a ZTE H268A ADSL/VDSL modem. Behind this is a Netgate XG-7100 running pfSense 2.4.4-p3.

However, the modem can be flakey sometimes - we've had a few occasions where the connection will go incredibly slow (i.e. 3-4 minutes to load google.com) - and we have to power-cycle the modem to fix things. And when we tried to put it in bridge mode (with a pfSense router behind it) - the connection would work for a day or so, then we'd need to power-cycle it.

The GUI interface is also slow and frustrating.

Is there a VDSL modem that people would suggest?

We don't necessarily want the cheapest, but something that's reliable, performs well, and has good manageability. (I can't seem to find any VDSL modems with console access, or out-of-band control).

I see the Draytek Vigor 165 is meant to be good, or the older Draytek Vigor 135 or 132? Any other brands/models that are good?

There's a list of "officially" supported modems here:

https://whirlpool.net.au/wiki/fttn_registered_modem_router#vdsl2_modem_routers_isp_settings

And the list of features they have to support are here - vectoring support is required:

https://www.nbnco.com.au/content/dam/nbnco2/documents/sfaa-wba2-product-catalogue-nebs-product-tech-spec-fttb-fttn_20150904-to-20151102.pdf