I need to be able to print draft copies of books, brochures, photos etc. to proof them before they go to a printer and to show clients to give them (and me) an idea of how things will look before they get a proof copy from the printer. I'll need colour but I expect black and white and grey scale to be the bulk of it. I need it to print both sides (duplex). It needs to be able to show graphics in colour and grey scale reasonably well. It doesn't need to be fast. It doesn't need to print on special papers. It doesn't need to do photos on photo paper as I have access to a very good photo printer.
I do have an older scanner but wouldn't mind replacing it with an all in one printer/scanner if the scanner on the printer was of very good quality because I do need a very good scanner for scanning photos at high quality for printing restored photos and to use in publications.
For paper size, up to A3. Brochures go all the way to the edge but I suppose I could proof scaled down versions as I doubt printers go all the way to the edge. I can't imagine larger paper sizes would be required often enough to be worth the added expense of printers that do larger paper.
Budget: don't know yet. I'd like good quality, a workhorse. I'll look at the spend after I get a range idea.
Connectivity: wifi would be ideal. I'm not sure if I'm going to sit it in the hall next to my fritz!box 7390 router and network it that way via the router USB port or in my office next to my laptop where I suppose it will take up a USB port.
OS used with: Windows 8.1, AirPrint for the iPads would be nice but not essential.
Thanks for your suggestions!