Mine is 42" high. I'm the same heighth as you & it's real easy to lay track, put in scenery, etc. Also, my boards are only 3ft deep. If they are any deeper than that, you won't be able to reach the back of the layout w/out crawling up on the tops.
Most people make them eye level for better realism. I'm not realistic, so, I did them for more comfortable working conditions.
Larry