Personally I would avoid all-in-ones, though you are right to go for laser rather than the vagaries of inkjet.
My objection is that these devices are devilishly complex and tend to be built down to a price. When one part goes wrong you have no use of the rest while repair is carried out or you face replacing the whole thing. Perhaps why I often find these units in dumpsters.
For only a little more you can get a separate scanner and printer -- copying is pretty simple using those. Fax is used so little these days, a simple standalone will often suffice.