If the new printer is an A4 printer you should have no problem. It's just that you need to remember to set the paper and resolution the suit what you are doing.
If you are using Windows then a Canon Pixma IP1600 or IP1200 (same printer without the black cartridge, but you can install the black cartridge, buy one when you buy the printer), These are fine printers for photo's and you can set up different profiles for different jobs.
I don't know how good they are with a Mac, but DO NOT buy Canon printers or scanners for Linux systems as they do not supply suitable drivers for systems based on this.