HP large format printers ain't cheap, but they're about the best. We had an E-size
unit (I forget the model) and it was beautiful. Really good print quality on paper up to 4 feet wide, and fast for an ink-jet. Reliable, too. Only drawback was the price of the ink cartridges. We always used official HP ink, even though there are cut-rate copycats out there. Figure the cost of repairs if cheap ink fouled the printhead and it's a lot better to stick with what you know will work right every time.
John