Your budget will also play an important role... I chose the Epson R1900 which does super B size prints with outstanding quality, and with roll paper 13" by 40" is possible. After the learning curve of about fifteen prints, I have been blown away with my prints especially up close. That, with a budget of $500 and I'm a happy camper... I still use my connections to do the large ones anyways, not selling 30"x40" in bulk or anything, but making a killing on 12"x18"s now.😉
In my experience, Epson printer drivers are far more 'mac compatible' than HP software.🙂