Another Router thread but working to much smaller situation than most others.
60-65m2 approx size apartment with some wifi congestion in apartment living etc.
Have gone with 250/25 HFC NBN plan with AussieBB and current old Telstra router doens't much deliver the speed vs ethernet to the NBN box itself etc. I've seen it get on average worse than what Telstra Cable 115/5 was, so pretty confident the WAN port or the router itself is limiting.
Ideally will when available move to 1000 speed plan so looking at a router that can deliver but also have floor plan that may or may not confirm if Mesh setup is worthwhile.
Floorplan below:
https://imgur.com/a/HG2ILLZ
Key - R is where current router is, N is the HFC wall spot and T is where PC tower will be.
Unforutnately ethernet is not possible, and I have doubts on powerline being able to work on the apartment setup etc plus late 50's built wiring etc I have doubts. Happy to be proven wrong but also not really sure how i can test or buy/return a powerline kit if it doesn't work.
ultimately i'm looking to help ensure as best speed throughput as possible, latency as well for gaming etc.
Total devices, 2x laptops, 2x iphones, 1x printer, 1x PC-Tower.
I'm also looking to upgrade the Tower's PCIe card reciever as well to match or deliver better capabilities if any recommendation or bundle in that space as well.
https://www.smallnetbuilder.com/ is your friend.
Your kinda all over the place in that wall of text, you need a new router I think cause the telstra one isn't good enough/ working?
I have 34 devices connected to my T-mobile/ asus 68u and I use a combo of powerline wifi and switches. Albeit I'm on FTTN crap, basically you need/ want a gigabit WAN port the rest is how you see fit, powerline will half your LAN so will some Mesh arrangement so bear that in mind. Using the above resource might help in what direction to take, no idea what you mean about PCIe card reciever? You mean the NIC or add on NIC?
edit: BTW my house was built in the 20's and is small but larger than your apartment, you have a condensed area where mine is long, the above router more than suits my needs also the powerline with this archaic wiring. As the other suggestions below meet todays needs as tech. moves fast