Too Long; Didn't Read
The only brand of computers I recommend for software developers are the following: Macbooks. Microsoft Surface Pro 3 - Silver, 256 GB $310 is a potential diamond in the rough. For ninety-five percent of software developers, I recommend a Macbook for most of your work. If you have certain requirements for your laptop, eg. Unless you want to have a Dell XPS or the Surface Pro, go ahead and buy one; those will serve one of those. Stick with what is and true, and only keep the list of the computers you use.