Print servers for 30 client Mac Mini Lab

I have a 30 client Mac Mini lab with printing done by 2 networked HP Officejet 8600+ printers w/ 128mb memory. I would like to have a print server that will speed up the printing(kindergarteners can be impatient). A dozen years or so ago there were separate print servers that managed print requests and gave you only 1 queue to keep track of, but I haven't found one lately for 10.5. Will simply routing print requests to our current document server(PowerMac, Intel 2, 500gb) and giving it the 8600s' IP addresses give me the speed boost I need?