If I were a consultant, looking to advise a financial planning firm with approx 1,500 financial planners across the United States, on what computers and other hardware they would need to purchase - what recommendations should be made?

In this recommendation, selecting only two types of computers (desktop, laptop, notebook or handheld computers) and other hardware components.

Not sure what features, performance in hardware tests and costs should be recommended. I realize that memory, battery and storage are all important factors, but not sure where to begin in my search. Any suggestions on what I should look for or what special considerations should be given to the nature of their business as they primarily buy and sell stocks bonds and mutual funds?