Council for purchasing routers

Hardware Questions and Recommendations
1

Good morning everyone, I would like to buy a new router to cascade with that of my ISP, I'm undecided between these three:

Could you advise me which of these is definitely compatible with OpenWRT? Then I would like to add the VPN and I would also like to add the PCB (policy based routing) so can you give me some advice?
Thank you

2

only the Cudy is supported, I still would have gotten the T-56 :slight_smile:

3

It's not easy to mod!

4

compared to a Cudy or GL-iNet, it's not.