In reply to estivoautumnal:
A cheaper Canon option to add to the mix is the Canon ip8750 (A3+) at <£200.
Uses a six ink dye system (the Pro-100s is an 8 dye inkset)
I've got the iP8700 and it does a good job.
But if I was spending your sort of budget, then I'd go Epson, so either the SC-P600 or SC-P400.
The P600 can also use roll media for panos.
Or save your pennies and go bigger to the A2 Paper SC-P800, which can also do roll media for bigger Panos. But you'll have to double your budget.
Post edited at 19:49