I am new to this.
We have a 2 story townhome.

Our internet connection is in an upstairs bedroom (office) and now
connected to 2 computers via an old SMC Barricade router.
I want to ad a wireless laptop into the mix so now I am searching for a
good wireless router to replace the SMC.

The new laptop will have this: "Built-in 802.11abgn wireless".
I need a signal that will go through to the bottom floor and no more
than 50-60 feet max is needed.

Which router will match my needs best?