wow, um...... y3s, y0u w1ll b3 abl3 t0 play LAN gam3s b3tw33n th3 tw0 c0mput3rs.....
Depending on your budget (and availability), a router might be a better idea, as you would also be able to share internet between the two without having to run Internet connection sharing on one host, which would have to remain on to provide connectivity.