Richard,
Thanks for coming back. My pricing over here shows the smaller printservers coming in at around 45GBP. My only worry is the support for appletalk over the Negear router, which is a bit of a dark area. Without that, the Mac wouldn't be able to talk to the printer.
<Thinks outloud> Unless I put the printer on the network with the parallel sharer for the benefit of the Windows machine and kept the direct connection to the iMac with the USB, which it already shares quite happily with the iBook.
I can't justify 100GBP on a new router, when the old one is still working, my line in is only 1Mb and I have no desire to stream video over the wireless element.