In article ,
"Al" wrote:

[snipperized]

So what I'm wondering, over time will MDF or Birch ply sag more? The only
weight on back section will be the monitor, yeah we're still with crt's.
[snip]

Why not use particle board? Cheap, flat, and get the 1" thick stuff.
Laminate the edge, forget about the bottom.

The stuff don't flex much either.