I have worked with both Atlas, and Ross switch/Gargraves. Each required different tools and mind set to do custom work. Often depends on what you want to do. For both, I use a relatively inexpensive (Midwest) cork road bed to raise the track off the table.
Slideshow of Atlas track layout. Click on the underlined phrase to access.
My friend Tom's Ross/Gargraves layout. Click on the underlined phrase. This layout was done with all used components. Some of the switches are Gargraves.