The Lexmark C540N gets 6/6 on PC Pro's A-List (http://www.pcpro.co.uk/reviews/printers/353659/lexmark-c540n).
Many retailers seems to be asking for £200+ for it, but Oyyy have it for £152.74 inc VAT & free delivery.
If you order before 31st March , you will get a Lexmark X4975VE multifunction inkjet printer worth £59.99 for free. It's probably not the besk inkjet / scanner in the world, but it's networkable (wired or wifi) and it is free :-)
Review of the X4975VE is here:http://www.trustedreviews.com/printers/review/2009/04/03/Lexmark-X4975ve-All-in-One-Inkjet/p1