Digital BW, The Print

I recently bought a recondioned Epson 1280 and Lyson Quad-Tone Black 
Inks (Neutral)cartridges. I've run several prints, using various 
settings, and no matter what I get prints which look blueish in 
sunlight, reddish in incandescent, and at that still look 
like "digital" prints, with posterizing or something going on. I've 
looked through the posts here and there isn't much in reference to 
Lyson, most discussion seems directed to MIS. I was wondering if 
Lyson is sort of a bastard-child of quad printing? I've already 
ordered MIS to test them out...

Scott