499 Lenovo L420 (i5-2520m) or 399 L520 (i3-2310) after $300 cash back

Got an email from centre com for some cash back deals with Lenovo.

The pricing seems pretty good for what you get.

L420

Processor : Intel Core i5-2520M 2.50GHz (up to 3.20GHz with Turbo Boost Technology)
Memory: 4GB (4GB X 1)1333MHz DDR3 (up to 8GB)
Chipset: Mobile Intel HM65 Express Chipset
Hard Drive : 320GB / 7200rpm Hard Drive
Optical Drive: Multi Burner/DVD CD Multi Recording
Display: 14.0" HD Anti-glare LED Display, 16:9 Aspect Ratio
Graphics: Intel HD Graphics 3000 processor graphics with dynamic frequency
Audio: Integrated
Camera: Integrated HD 720p Camera
Communication: Bluetooth, Advanced-N 6205, WWAN Ready
Ports:
    4 x USB 2.0 (1 Powered USB)
    1 x Always-On USB 2.0 with yellow marking
    1x eSATA
    1 x Display port with Audio
Slots: Express Card
Card Reader: 4-in-1 reader
Battery: 6 Cell
OS: Microsoft Windows 7 Professional
Weight: 2.3kg with 6-cell batttery
Dimensions: 344mm x 233mm x 32.0mm-36.0mm
Warranty: 1 Year Depot Warranty
Extra: Active Protection System, Advanced Spill Resistent Keyboard

L520

Processor: Intel® Core™ i3-2310M Processor (3M Cache, 2.10 GHz)  
Memory: 320GB Hard Drive Disk 7200RPM  
Storage: 4GB DDR3 (1x4GB) 1333Mhz Memory
Graphics: Intel HD Graphics 3000 processor graphics with dynamic frequency
Optical Drive: DVD-RW Multi Burner 
Audio: Intergrated
Card Reader: 4 in 1
Ports:
    4 USB 2.0 (1 Powered USB)
    1 Always-On USB 2.0 with yellow marking
    1 eSATA
    1 Display port with audio
Webcam: Intergrated HD camera
Network: WiFi-n, WWAN Ready
Bluetooth: Yes   
Operating System: Windows 7 Professional 
Display: 15.6" HD (1366 x 768) LED Backlit Anti-Glare Display
Extra: Roll Cage Technology, Active Protection System, Advanced Spill resistant Keyboard
Warranty: 1 Year

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