I don't know if it is true or not but HP claims that the per-page printing costs of their newer colour deskjet (inkjet) printers is lower than a colour laser.
Apparently Cannon owns the patents on colour laser technology and HP has to pay large royalties to them which makes them more expensive to operate. Additionally, the newer inkjet technologies use much less ink than before so cartridges last longer.
This was told to me by an HP rep at a conference I was at. I've never looked into it so please investigate yourself before making any decisions.
At first blush I was sceptical figuring that he was just trying to justify the high cost of replacement ink. Then I realized it didn't make sense for him to be talking me out of buying the laser printer since it was much more expensive. Why would an HP rep talk me down to the $400-$500 deskjet when I had originally been interested in a $1200 laser?
Regards,