I have a two node  W3600  Deco unit  ( same as x20)

working great since TP-Link provided an update to disable UPNP -  thanks

However,  I get occasional hiccups - slowdowns/disconnect

I have over 40 clients hooked up and my memory usage is over 80 %

looking into it -  but for now,  what I want to know  is if upgrading to a X60 or X90  will provide more processing power and if that would be a good improvement to consider

thanks again