even though you probably shouldnt be using an inkjet if speed is your number one concern (unless you want to spend a crapload on ink), that is pretty damn impressive.
The printer that impresses me is the Xerox Phaser. A $400 colour laser printer that prints 600 DPI is cool. I just bought one for my sister. It will cost about $320 to change all of the laser cartridges, but that gives you over 5000 printed copies. With an inkjet cartridge being good for only 200 to 300 copies, the cost savings is huge.