Colour or Laser?
Laser = go for the Samsung ML-4500 only £59 +vat at Dabs right now. Quite good too.
Colour= go for one of the more business orientated HP printers I've used the HP-1220c A3 color injet in a heavy use office and it held up well. Replacement carts are expensive but large so it works out cheaper than some budget inkjets.