Who ya got?!?!

Earlier this month, I came to a decision to get an ASUS N61JQ-X1 16-Inch Versatile Entertainment Laptop:

* Intel Core i7-720QM Processor 1.6GHz w/turbo boost up to 2.8GHz
* 4GB of DDR3 1066MHz SDRAM, 2 slots, 8GB Max
* 320GB Hard Drive (7200 RPM); Super Multi Optical Disk Drive; Wi-Fi 802.11 bgn
* 16-Inch HD LED LCD Display; 2.0MP Webcam; Bluetooth; HDMI Port; ATI 5730 Graphics Engine with 1 GB DDR3 Dedicated VRAM
* Windows 7 Home Premium (64 bit) Operating System

Then today I find out that a similar model, ASUS N61JQ-X2, has recently been released that features a lesser processor but bigger HD and NVIDIA Optimus (switchable GeForce GT 325M graphics):

* 2.53GHz Intel Core i5-430M Processor
* 4GB of DDR3 1066MHz SDRAM, 2 slots, 8GB Max
* 500GB Hard Drive (7200 RPM); Super Multi Optical Disk Drive; Wi-Fi 802.11 bgn
* 16-Inch HD LED LCD Display; 2.0MP Webcam; HDMI Port; NVidia GT325M Graphics Engine with 1GB DDR3 Dedicated VRAM
* Windows 7 Home Premium (64 bit) Operating System

I am planning on using my laptop for work (architect) and I use alot of AutoCAD, Revit, Photoshop, and other 3D modeling and rendering programs. Which model out of the 2 would you go with?....now what if I told you that the newer model was $100 less?