i set up our 5 physician heart center with a hp4050 laser printer (probably a more recent version now). it is a fantastic printer. rated for 50,000 pages per month. excellent experience with the toner cartridges as well. beware the low end cheaper lasers, you get creamed on the toner costs.
the really neat trick i did with our printer (its on a LAN i set up) is to attach a HP printerpal (not made anymore, but available new in box off ebay, be sure to get the laserprinter version of the printer pal. PM me about this if you want) The Printerpal is a receive only fax module that allows you to print faxes on your laser printer! saves tons of money not having to by disp[osable for a fax machine, more reliable mechanically, laser output, one less thing for the secretaries to "maintain" then use any old fax machine to send faxes (we get about 5,000 pages/;month faxed to our office, use to have a fax machine that ran out of paper or had mechanical problems constantly).
highly recommend hp
highly recommend getting a decent printer for office use (1000-1500 is the right price range), you won't regret it.