Keep what you can wired. The wifi bandwidth is shared unlike the wired ethernet which can use a SWITCHED HUB and you get full throttle from machine to machine without impacting the LAN.
I've seen folk think "I'll make it all wireless" and they learn later that's not ideal.
Here's my situation:
I run a business out of a converted basement in my house with a few employees. Currently, I have a wired router for a few PCs going off of one ISP. I am moving, and I am changing the setup. This is what I want ideally in the new setup:
I will have two ISPs (one cable modem, one DSL) coming into the house. I want WIFI routers / connections to 7 PCs to be able to connect from any of the 7 PCs to either network at any time. These desktop PCs are not configured yet to accept a wireless connection - each one needs a wireless card or wireless USB network adapter...but if the latter, will it pick up both networks like the wireless card would? Also, not really familiar with DSL - will the input from this ISP go into "DSL modem", like the cable modem?
At the end of the day, this all should be fairly easy and straightforward to set up, but I want to get some feedback, if possible, to ensure that I am not forgetting anything. Any and all comments would be very much appreciated.