The Z3200PS 44" (Q6721A) is the only version available in the 3200 series besides the 24" standard version. The nice part is that HP has a promotion going thru the year that will qualify you for up to $200 of FREE HP media on the Z series. (No mail-in necessary!) The other series have different promos for media as well.
If you have questions regarding this model or other printers, we would be more than happy to assist you with them.