Will you need to add a deticated circuit to run one of these guys?

2000/110 = 18A, and that assumes these power supples are 100% efficient, which they most definately aren't.

So well over 20A on a circuit, most breakers are only rated for 15A.

Add a monitor or two, desk lamp, speakers, TV or what else you might have in that room and you're going to easily need another circuit.