Products we use on our layouts:
Gargraves- They generously donated all of the flex track for our trains of Christmas Layout rebuild.
http://www.gargraves.com/
Fast Tracks – We are currently using their track assembly fixtures on our 2 rail O scale layout to build high quality switches / turnouts.
http://www.handlaidtrack.com/
Ross Custom Switches
http://rossswitches.com/