So Dell is offering 2 different sales.
one on the S2340L monitor for $170 with a $100 Dell gift card
and the other is a lower tier Steambox, the Alienware Alpha, for $500 and a $50 gift card.
so in theory you could buy the monitor and get a $100 gift card good for the Alpha and maybe you can convince a Dell rep to give you both discounts at once.
worth a shot to save another $50
Goodluck
$520 for a decent rig and a great screen? not too bad