Best low-end laptop??

I am about to start the MBA program at...sorry guys...I really am a Tigers fan...Tulane. Some...ok, most...of the the classes will be online. I need a laptop JUST for taking these courses. The minimum requirements that the university suggests are basically what a 4-year-old computer would come standard with. no gaming, no music or video downloads, just a solid wireless connection with the best speed possible for around $600.00. Of course, I'll go higher than $600.00 if there is a real reason to do so.

So, what's the best $600.00 laptop out there?