It all depends on what games but:
http
/store.acer.com/store/acerna/en_US/pd/productID.267354500/parentCategoryID.60766600/
is a great deal at $529 shipped
http
/store.acer.com/store/acerna/en_US/pd/productID.259041100/parentCategoryID.60766600/
also a good deal at $650
http/www.notebookcheck.net/Comparison-of-Laptop-Graphics-Cards.130.0.html
is a great laptop graphics comparison link (as well as Toms monthly best graphics card for the money)
and you can check newegg also