The most important thing with Laser printers is to look at is the refil / toner prices, lets face it you can get a decent unit for £60 (Some of the basic HP's) but the prices of the toners are like £50 or something, which means its almost cheaper to buy a new unit.
Im currently using here a Colour HP 2600n (its also network sharing) , its excellent but refils are expensive. (Mind you i dont print much, so its lasting ages and ages!)
Mines a model up, and with network, but for the money id say this one sounds good. Depends if you likely to really print 1000's of sheets....
http://www.ebuyer.com/product/118901