Upgrade Router

I am currently using a BT Voyager 2091 which has given excellent service, however I want to add in wireless connection to 2 printers, and connect another PC via wireless. One PC is currently hardwired which I wish to keep.

Which hardware product and what problems might I encounter changing over the router such as uninstalling the present unit, installation and settings etc.

I use the Canon IP5200r printer. It has wifi to talk to your router.