Truthfully, the brand matters less than you'd think. What's more important is the quality of the laptop, and for small businesses, that means buying business-grade laptops. Most laptop manufacturers have a business line of laptops that are designed for the rigors of a business environment, and in our experience, they're a perfect fit for small biz.
Here's an article I wrote a few months back that'll help explain my point: http://jackrabbit.com/blog/2010/11/5...de-technology/
Alex @ Jackrabbit.com