I think
CrakRevenue would serve you well.
It's CPA advertising and with that many visits per day you should easily be able to bring in $250-$750 per day using Crak.
I have far less USA traffic than you, and less overall traffic than you per day and bring in more than $500 per month on one of my sites.
I think you would find great success with Crak's plethora of offers and guidance from their affiliate managers.
If you're the type of person who will not settle for a copy and paste banner code and are not afraid to use a little creativity to make some extra $$$, Crak would be perfect for you and your volume of traffic.