The Epson 890 uses 6 color piezo inkjet technology ($300). One of these is working well for my daughter, who puts out her own brochures for her store, as well as using it for hobby purposes.
The HP 1215, same price, I believe still uses the 4 color system, but turns out about the same resolution. I think they are a little behind at the moment, but that is a personal opinion only.