Which security software should I go with for my laptop?

I'm currently in the process of building a laptop through Dell. It is an Inspiron 15.

Here is the summary of the laptop

MY COMPONENTS

Intel® Pentium® Dual Core T4200 (2.0GHz/800Mhz FSB/1MB cache)
Genuine Windows Vista® Home Basic Edition SP1
Jet Black
Microsoft® Office Home and Student 2007 - Word, Excel + PowerPoint
2Yr Ltd Hardware Warranty, InHome Service after Remote Diagnosis
Glossy, widescreen 15.6 inch display (1366x768)
4GB Shared Dual Channel DDR2 at 800MHz
320GB SATA Hard Drive (5400RPM)
Intel Graphics Media Accelerator X4500HD
8X CD / DVD Burner (Dual Layer DVD+/-R Drive)
Intel WiFi Link 5100 802.11 Wireless-N Mini Card
No Webcam Option
6-cell battery
High Definition Audio 2.0

MY ACCESSORIES

McAfee SecurityCenter with anti-virus, anti-spyware, firewall, 30-Days
Norton 360 - All-in-One Security Solution

MY SOFTWARE & ACCESSORIES

WildTangent Games

MY SERVICE

Dell Remote Access, free basic service
Dell Online Backup 2GB for 1 year

ALSO INCLUDES

Adobe® Acrobat® Reader 9.0
Integrated 10/100 Network Card
Intel® Pentium® Dual-Core Processor
Windows Vista™ Basic
No ISP requested

I'm trying to decide which software to go with for security. McAfee offers a 36 month plan for . Norton doesn't seem to have an expiration date and it is . I would appreciate any intelligent reasons for why to choose either. Also if you think McAfee is better but not and in need of a renewal better please tell me.

All input is greatly appreciated. If you have any other advice on other aspects of the computer I would be very grateful. Please keep in mind that I am building this computer to use as a college student.

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