The IPF6300/6350 have been out for about a year or less now. 6300 is a 12 ink system as well as the 6350, but the 50 version has the HDD.
The IPF8300 is such a big hit printer that Canon might not be coming out with a newer model in place of it for sometime.
They don't include the Spectro, but it's optional. Epson's newest printers are the 7890/9890 and the 7900/9900. Also, they came out with a new Eco-Solvent printer; S30 which is a 4 ink system and better quality as well as speed vs the GS6000.