Which laptop should I get?
I am a architecture student and I use software's like AutoCad and Photoshop. Which laptop should I get? I listed 3. Thank you!!

Inspiron 15R Touch:

Operating System Windows 8, 64-bit, English
Memory 16GB Dual Channel DDR3L 1600MHz (8GBx2)
Keyboard Dell Chiclet Keyboard with Multi-touch Touchpad, US English
Video Card Intel® HD Graphics 4400
Driver Wireless Driver, 1705
Hard Drive 1TB 5400RPM SATA Hard Drive
CD ROM/DVD ROM Tray load DVD Drive (Reads and Writes to DVD/CD)
Wireless Dell Wireless-N 1705 + Bluetooth 4.0
Power Cable Power Cord, US
Documentation/Disks Documentation, English French Dutch
Support 90 Days Premium Phone Support + 1 Year In-Home Service after Remote Diagnosis
Systems Management System Driver, 5537
Windows 8 Documentation Windows 8 Documentation
Retail Software Retail Software - All WIN8
Order Information Shipping Information
Primary Battery 65 WHr, 6-Cell Battery (removable)
Energy Efficiency Options ESTAR 5.0
Processor 4th Generation Intel® Core™ i7-4500U processor (4M Cache, up to 3.0 GHz)
Packaging Label Dell.com Order
Color Moon Silver
Packaging Shipping Material, Direct
FGA Module INS15R_1405_509/BTO
Optical Software Cyberlink Media Suite Essentials DVD
Additional Settings PocketCloud Companion, Standard, Digital Delivery
CFI Included (Smart Selection) CFI Not Included
Palmrest Labels Touch Palmrest Label
Display 15.6 inch LED Backlit Touch Display with Truelife and HD resolution (1366 x 768)
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OR

HP ENVY dv6t-7300 Quad Edition Notebook PC

Windows 8 64
3rd generation Intel(R) Core(TM) i7-3630QM Processor (2.4GHz, 6MB L3 Cache)
Intel(R) HD Graphics 4000
15.6-inch diagonal High Definition BrightView LED-backlit Display (1366 x 768)
12GB DDR3 System Memory (2 Dimm)
1TB 5400 rpm Hard Drive
NO mSSD Hard Drive Acceleration Cache
Microsoft Office Trial
No additional security software
30% off 9 cell Lithium Ion Battery
SuperMulti 8X DVD+/-R/RW with Double Layer Support
Standard Keyboard
HP TrueVision HD Webcam with integrated dual array digital microphone
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OR

Sony - VAIO Fit 15.5" Touch-Screen Laptop

3rd Gen Intel® Core™ i7-3537U processor
Intel® Core™ i7 processor
12GB DDR3L memory
Multiformat DVD±RW/CD-RW drive with double-layer support
15.5" LED-backlit high-definition capacitive touch screen
Intel® Wireless Display
1TB Serial ATA hard drive (5400 rpm)
NVIDIA GeForce GT 735M graphics
Assist action button
Built-in 1.0MP high-definition webcam
2 USB 3.0 ports and 1 USB 2.0 port
Bluetooth 4.0 + HS interface
Built-in 10Base-T/100Base-TX/1000Base-T Ethernet LAN
Weighs 5.7 lbs. and measures just 0.9" thin
Polished aluminum lid
Microsoft Windows 8 64-bit operating system preinstalled

Go for the Sony as it is the only one with a discrete graphics chip.
While the Intel extreme is good, given the choice it's found lacking for high end graphics programs.

Frankly I think a 15" screen is too small for CAD work. Other than that I agree with Ben that you want graphics power and the Sony offers that.