Marc, Yes, I connect a $100 Edge router into the Verizon ISP supplied router.
I can't recommend anything. Romaz, Blacmorec, SBO6 or MANY guys that are not speaking up yet are very knowledgeable with the network technicalities might be able to advise more adequately.
Over the last month I have observed, those mentioned members as well as Emile and read up a bit and then got a procured a few devices and started plugging them in to see what would happen. Each time I added a device including LPSs to the two routers, BETTER sonics were definitely observed.
Not the same with the fiber or copper. They sounded different to me, not better or worse. But the added router, switch and LPSs all made a positive sonic difference. I just went from doing one, then the next.
So with my naive network network understanding, but with a little experience now if it were me, I WOULD get another router and connect it with one of the lan ports on your main router. Get it from somewhere you can return it. Try it and see. If you don't like it or can't tell a difference send it back.
I don't care really what anyone says, I know that I will only know if I like something if I connect it and listen. If I'm not sure if there is a jump in performance when I listen, then the answer is no. I pretty much have to say wow, not WOW, but wow......then it's a keeper.
WHAT I HAVE LEARD AND TAKE FROM ALL OF THIS IS THAT THE NETWORK SIDE OF THE EQUATION IN MY SYSTEM(S) HAS MADE A HUGE POSITIVE SONIC DIFFERENCE.
The network side of the equation might not make any difference or a small difference for someone else and their systems/network that's fine, I feel fortunate that I discovered it and it worked for me. Also if/when possible I enjoy helping others find what I found. It's a good thing.
if i get this right, your fios quantum router feeds 1) your edge router and 2) all the rest of your stuff on two separate lan cables.
did you have to disable DHCP on your edge router (so that the two routers don't fight over who assigns IP addresses), or are you setting up a subnet or something like that with the edge router?