I have been a spotter in the same rural area for many years. I know almost all the roads in the area, so I have had no need for radar software with a decent map. I have been making do with the $9.99 RadarScope Android app just fine. Now that I have decided to start chasing I need a radar program for PC that has a good map & is capable of displaying my GPS coordinates. Any ideas on a good usb GPS? Also, Verizon or AT&T for Texas & Oklahoma?