What is the best, compact document printer to take on business trips? Thanks :)?

You really only have two choices - the cannon or hp. Both color - both have battery options, both ink jet.

My organization uses both for extensive travel & I own both. The biggest problems are paper feed and the types of paper the use. They are not for high volume but the cannon "holds" a few more sheets than the HP. GO to a store and try them both. - best bet - if you travel for business - many hotels etc have business centers that will allow you to connect to their printers. I am also interested in portable printers with wireless options.