How to set up multi-room Phantoms via ethernet?

[andrewhollo]

I have the following system I want to set up in a newly renovated house using a Dialogue, two Gold Phantoms and a Silver Phantom. However, I'd appreciate advice on precisely what I need to connect to what!

NORTH ROOM
Two Golds.
Two ethernet outlets.

SOUTH ROOM
One Silver
Two ethernet outlets.
Airport Express (connected to one ethernet outlet)

CENTRAL CUPBOARD (locating between N and S ROOMS)
Modem (Netgear Nighthawk -- supplied by my telco)
Router (Apple Airport Extreme)
Dialog
Ethernet panel

My question is whether the chain should look like this?

CUPBOARD
Dialog to Modem (by ethernet)
Modem to Router (by ethernet)
Router to ethernet panel (by ethernet)

NORTH ROOM
Simply connect each Gold to its ethernet port

SOUTH ROOM
Should I connect the Airport Express to one ethernet port, and the single Silver to the other?
OR
Should I connect the Airport Express to one ethernet port, and the single Silver to the Airport Express (by ethernet)?

I'm moving on Wednesday, so advice much appreciated!

Andrew