What is Reddit's opinion ofTV Top Shelf Mounting - Screen Top Shelf, TV Screen Storage Bracket Stand, TV Monitor Stand, TV Wall Mount, Wall TV Bracket, Cable Box Shelf for Wall Mounted TV (2Pack Black)?
Not sure if I can post links here, but Amazon has these little shelves that are intended for TVs, but they work great for computer monitors too - I have one on all of my monitors. If the link don't work, search Amazon for "TV top shelf"
Popular alternatives to
TV Top Shelf Mounting - Scr...
Stanley ATS-124 TV Top Shelf-Large Size, 24-Inch Width
WALI Floating Entertainment Center Shelves, Holds Up to 17.6lbs, TV Shelf with Strengthened Tempered Glasses for DVD Players, Cable Boxes, Games Consoles, TV Accessories (CS202B), 2 Shelf, Black