I have been looking for "software" that provides read-out to show
WiFi signal strength. Can you tell me more about your "wifi utility
program"?


There's "Net Stumbler" that will give you a time/signal strength graph.
It's what the wifi card reports.
Did a google search,found it at
http://www.netstumbler.com/downloads/


I noticed that you intend to use a coax cable to connect the WiFi
antenna to the Computer. Would it be difficult for you to locate the
Router or access point at the antenna so the coax will be shorter?

That would actually be the better way to go, as there'd be less loss in
the coax. But I'd have to change a lot of things in the physical layout
of my shack...