What kind of laptop do you suggest for college?

I am currently looking for a laptop for college and I have a list of requirements that the college has for laptops, but knowing absolutely nothing about computers, I need your guys’ input. What is the best quality, most reliable(and durable) computer that meets the college’s requirements? The college’s requirements are: Processor: dual Core 1.3 Ghz or higher, RAM: 4 GB, Hard Drive: 250 GB, Wireless card: 802.11n, Operating system: Most recent version for your hardware, Up to date virus software, Webcam, DVD/CD drive/burner, external hard drive (for data backup/extra storage), and laptop security cable.
Also, I am considering getting a laptop that is inter-changable between a laptop and a tablet. Any help is appreciated! Thanks