[FerrariEnzo]

How many users will require cable connection and how many users using wireless connection?


You can disable the routing function on D-Link if you need wireless...

I would go

Gateway > Wireless Powerline Router >Switch

This way with the powerline router, your all set if you need LAN connection in a different room, just get another powerline LAN adapter, this way you dont need to lay our the ethernet cables)
The newer modems are pretty much a wireless router, so you dont need 2 routers doing the routing function!??!... Disabling DHCP on the router essentially turns the router into a switch but with more control.. The added switch makes more LAN ports if you need it in the same room, otherwise the powerlines would serve pretty good in seperate rooms. You could have a few Wireless Powerline adapter around the house if you need the wireless connection instead.