In my experience HP has the deepest blacks. For line stuff it should be great. Even gradients should be OK. Keep in mind that the Z series uses 4 inks to do black and white. My old HP 130 had one, and it did a decent job. The problems start when you see better prints to compare to, particularly the same image print. For that, you might consider the old HP 130. I think they still have it for sale(At least I saw it last year). 130 is a 24" with 6 inks. It has a sheet feeder, NO wifi, and it has $20-25 pheads and $30-40 ink tanks. When I purchased it year back it was about $1200. I see them on sale either barely used under $1000. I'm not really comparing them, I just wanted to point out an option. HP likely doesn't support it. But if your familiar to inkjetting, I can see you be ok with that model and gain from the 6color set.