Opinions needed on these two Dell Studio XPS

I'm really struggling with the decision on these two Dell and trying to decide which order to cancel. I know the 1645 is faster, but I'm concern about the 4670. Is the 1645 worth the $100+ difference? Any opinions would be greatly appreciated.

FYI: I currently own a Studio 1737

Studio XPS 1645
1. 500 GB SATA Hard Drive (7200RPM) with Free Fall Sensor
2. 15.6 inch Edge-to-Edge FHD Widescreen WLED LCD (1920x1080)
3. 6 GB Dual Channel DDR3 SDRAM 1333MHZ
4. 130W A/C Adapter, 3P
5. 9 Cell, 85 WHr Lithium Ion Primary Battery
6. 1 GB ATI Mobility Radeon HD 4670
7. Processor: Intel Core i7-720QM Quad Core Processor 1.6GHz (2.8GHz Turbo Mode, 6MB Cache)
8. Intel WiFi Link 5300 802.11a/g/n Draft Mini Card
9. Price with shipping and taxes: $927.88

Studio XPS 1647
1. 500 GB SATA Hard Drive (7200RPM) with Free Fall Sensor
2. 15.6 inch High Definition+ (900p) W/LED Display and Camera
3. 4 GB DDR3 SDRAM 1333MHz (2 DIMMs)
4. 130W A/C Adapter, 3P
5. 6 Cell Primary Battery
6. 1 GB ATI Mobility Radeon HD 5730
7. Processor: Intel Core i5-540M Processor (2.53GHz, 3M cache)
8. Intel 6300 Wireless-N (2x2) Half Mini-Card
9. Price with shipping and taxes: $819.67

 

What will be the primary use of your laptop??

For gaming, the 1647 with the 5730, more reasonable 900p screen, and less chance of throttling will make a better system.

For web browsing, office work, and video editing/encoding, the 1645's quad-core i7 and 1080p screen will be better.

 

The system will be used for light gaming, heavy Visual Studio 2008/2010, web browsing, office work and video encoding.

 

Go with the 1645 then, the i7 and higher-res screen will make a difference with Visual Studio and video encoding. The 5730 is better for gaming, but the 4670 is still capable of light gaming.

 

Thanks for the feedback.