Don't short-change yourself. If you sit and type all day long for your job ... you probably have a bunch of extra stuff off ...
In short, you'll need to nail down a design ... and your chair will be able to slide below the desk if desired. An elevated shelf or hutch above your monitor is great space saving furniture ...
Don't short-change yourself ... How much of it needs to be on the desk? Can anything go into a drawer or on a shelf nearby? People often forget to use all the available space they have in their ...