I use fibernet with PPPoE connection. I pay for 250 Mbps download and upload. Mostly want to use OpenWrt for SQM. I don't expect to get straight up 250 Mbps with SQM, I want to get atleast 100-150 Mbps download though.
I did some research and ended up on few choices:
Netgear R6350 / R6850
Tp-Link Archer C7
Tp-Link Archer C6U
Not sure what router do I need to get though. If you have other options at this same prize range, I would love to hear them too!
If you don't mind purchasing at Aliexpress, you may want to check Redmi AX6S (~US$ 70). While OpenWrt flashing procedure is a little tricky in this device, the mt7622 SoC is a dual-core ARM which has a much better performance than mt7621 (MIPS).
I did a performance test and with you may likely achieve 500Mbps with SQM: