Cast my vote for using multiple printers. Preferably with any given
printer located as close as possible to wherever its assigned copy is
supposed to go.
Of course, given that the main reason why laser printers are so
inexpensive these days is because they're CHEAP (i.e., host-based RIPping
instead of printer-based, in a reversion to the bad old days of the "Tall
Tree JLaser" interface and its ilk, among other cost-cutting measures), I'd
imagine that most or all of them would have to be PC-connected rather than
direct Twinax or terminal-connected, but then again, I'm the only person I
know who still uses real terminals on a Twinax line.