Used to work in action sports / press photography and also did a lot of work for graphic stuff.
HP dominates the professional printing market for like banners / large format stuff, but as far as reliability, something that's going to last you a long time, not jam up as much, be good on ink, and also have good support - Epson is my suggestion hands down.
Had a problem with a printer that was out of warranty once and they ended up offering me a free refurbished replacement anyway.
Another benefit is that every time you put in new epson ink cartridges, you get new print heads, vs. other printers that have print heads that are in the machines themselves...leads to longer lifespan & cleaner results.
But like that one dude said, if you can, go for the laser machine - fast, super efficient, and clean as hell.