Research equipment and software

Business Proposal for equipment and software for field users. Research and recommend what model hardware Laptop-tablet for mobile usage. Preferably with cellular capabilities. Users are remote and on the move, need to carry hardware and do not always ha luxury off office desk. Must be able to run Lotus Notes and print to PDF to enable users to retrieve offline. Must be user friendly to enable to type ok keyboard. Recommend different models of Tablet-Laptop up to 4 to 5, possibility to explore other options with data security in mind, price is important. Please include Pros and Cons.