I have a pixma 780 all-in-one, bought about a year ago.
Ink is very cheap, quality is unbelievable - with a 7MP+ camera it's no different on an A4 size print to a blown up SLR image processed professionally.
Fax is fine, and the 780 has an autofeeder which works really well, up to 35 pages. It s also supposed to have software which will recognise several photos on the platen and split them up when scanning, so you can import lots at a time, but I haven't got round to using it. Photocopies fine in colour or B&W.
Only downside was that a small tooth on part of the mechanism which allows you to open up the thing to access ink has broken, makes opening it a pain. I could order the replacement part but, again, I haven't got round to it and I only need to open it every few months.
I did a fair amount of research before buying, and the Pixma all-in-one machines are a very good buy.
BW