I am currently using an horrible ISP provided router modem combo.
if possible i need it to be sub €50 can stretch this a bit.
it needs to have 1Gbps ethernet
4 ethernet ports if possible
Have 2.4 GHz and 5GHz
sufficient flash and ram for LEDE GUI and addons
and good community support
I'm weary to suggest certain models...feel free to look through the Table of Hardware. Flash/RAM size and information regarding support for the installed WiFi chips are noted. They also list of the ports are 100 or 1000 Mbps.