I think I have come to a decision on my plans for when I get fibre. We will be sticking with Zen as our ISP and going with their Unlimited Fibre 2 option. For the modem I am going to most likely get a second hand HG612 (unless someone can point me in the direction of a new one?), or if that doesn't work out a DrayTek Vigor 130 (not preferable due to almost 100% chance of Huawei cabinet). For the router, I have decided for now on the TP-Link Archer C2600, as it has good wireless performance and very good software. The router choice may change if someone releases something significantly better (installation of FTTC is Q4 this year apparently), but for now I am sticking with the TP-Link as other routers are either obscenely expensive in comparison for the performance gain, or have lacking software packages (*cough cough* Netgear *cough cough*).
Thank you all for your input, it is greatly appreciated, and I hope to join you in future contributing to DSL stats. If you wish to add any more please feel free, as my mind is not made up on router choice as said previously.