Those LaserJet 4 series printers are excellent printers. With proper maintenance they will run to a million pages no problem. Plus parts and supplies are cheap for them. They also use 72 pin parity RAM that is fairly cheap now. It is great that you got the postscript model. It will work with anything out there.

Did you get a JetDirect card? If not I would suggest getting one, they are very cheap. You should be able to pick one up for about $10.