$500 SAMSUNG R540 NoteBook Core i3 370M(2.40GHz) 15.6" 1366x768 w/Intel HD Graphics 4GB RAM 500GB HDD
This looks like the better deal. Better CPU, more RAM and bigger HDD.
$600 HP Pavilion dv6-3120us NoteBook AMD Turion II Dual-Core P540(2.4GHz) 15.6" 4GB Memory 500GB HDD 5400rpm DVD Super Multi ATI Mobility Radeon HD 4250