We have just taken delivery of a brand new large format printer. We have moved away from epson and are now using the Canon Pro 2000 using 12 different colours of Lucia pro inks to produce stunning prints with an extremely wide colour gamut.
Only had it up and running for a few days, but so far really impressed.
http://www.canon.co.uk/for_work/products/professional_print/large_format/imageprograf_pro-2000/