So far I've narrowed the list to Aussie Broadband and Superloop, which look reasonably on par. Any recommendations, or other suggestions?

I've been with Netspace/Westnet/iiNet since the 90s and they've been ok.. On NBN100/40 FTTN business account, according to Samknows/ACCC speed monitoring, I'm getting average of 96.4/36.8 with peaks in low demand times of 102/38. Now that iiNet's been absorbed by TPG, I might consider Aussie first if choosing from scratch..

I'll also need to do an equipment upgrade in the near future. Thinking of replacing our stopgap all-in-one device with Ubiquiti kit, e.g. an EdgeRouter, POE AP, switch. Anyone have experience with this? Is it overkill for a small home network?

I've been thinking about Ubiquiti myself - what gave me pause was that the UniFi USG with DPI enabled seems to be limited to 85Mbps throughput. Not sure I want to shave that off, but also not sure I want to turn off DPI. Am curious to hear how other folks have set themselves up. Have heard little bits about EdgeRouter etc.. Right now I'm using an Asus RT-AC5300 with some third party firmware mods.