Welcome, yes you have lucked out with the ECI cabinet as these currently do not support G.INP
If you planned just to keep your existing RT-AX82U, then I would say purchase a new modem (vigor 130) and that should help by replacing you older modem and be the less expensive option.
If you are planning to go AiMesh, then in theory the new DSL-AX82U used as AiMesh Primary and your rt-X82u used as Node (Child) should work very well, alas the dsl-AX82U is still very new so firmware needs to mature.
Both Broadcom and Lantiq DSl chipset work well on ECI cabs, Broadcom is usually rock solid and that is what the DSL-AX82U has
Hope that helps
(P.S) what a game between City ;-)
In a completely sane world, madness is the only freedom (J.G.Ballard).
Thank you for your reply uk-sentinel I will go the DSL route as I would have to buy another node anyway, One thing I will say about the AX82u it squeezed another 5MBps out of my line was getting 40 down on netgear x6 r8000 now getting 45, and I love the settings page the only thing I do not like is you can not all block new connections