A good thread to read: TurboPrint 7.6 is the latest revision of a highly acclaimed 24-bit printing package for Amiga. It replaces the old Workbench printer drivers for it's own system.
It has support for 5760 DPI printers but not the very newest ones. Cycling through the settings it can support borderless prints and even paper sizes up to A2!
EDIT:
Here's a list of TurboPrint 7.60 drivers:
