I have previously written a review on the excellent HP Photosmart Pro B9130 which we have used in our design studio for the past 18 month. This is more of a desktop printer we use for A4 presentations and colour matching, but we also have a Epson Stylus Pro 7600, which we use for outputting promotional posters and artworks for bakery clients.
We've had this printer for roughly 4 or 5 years and the quality of it's outputs has never deminished. It uses 7 colour ink cartridges (Photo Black, Light Black, Yellow, Light Cyan, Cyan, Light Magenta and Magenta) which come in either 110ml or 220ml and we find we get through a set once every 2 or 3 months (depending obiously on how busy we are). It produces Giclée quality prints (which means "to squirt, spurt, or spray") where the print head passes over the same area a couple of times in order to give a dense, high quality print area. This means the poster quallity will last for many years.
The Stylus Pro 7600 can also print on many kinds of media, although these have to be on a roll as it takes a 24" (610mm) roll of paper. We usually print on a 190gsm super dry satin stock which gives great results which colours coming out very vibrant and striking. We have in the past also used cartridge paper, canvas and a matte stock, all of which print very well.
Once the drivers are installed on your machine, the print selection is as standard through your artwork programme where you can set paper size, print resolution, output type, etc. We have the Epson connected via USB to a PC running Windows Vista which is used only for printing. On the PC, we run a RIP (Rastor Image Processor) software which calculates the print file before sending it through to print. The PC is connected by Ethernet cable to our network so all Macs can print to it. The printer can be connected direct to the network but you need the RIP software to be able to print correctly.
As mentioned, the printer takes rolls of 24" paper, which means you can print up to A1 paper size in portrait for (594 mm W x 841 mm H), which should suit any need.
Overall, this is too an excellent large format printer which we use regularly for client work. The colour matching to Pantone references is of a very high standard. The main perk for us is our clients remain happy and return time after time for more posters and outputs.