I'm looking into buying a HP 5510 for $200 @ Staples because it's a decent price for a 4-in-1. The Dell A960 is also 4-in-1 and costs only $160. However, it's a rebadged Lexmark and I've read that Lexmark costs per page are kinda expensive. Check Tom's Hardware, they have a new article on Multifunction printers.
However, in case anybody wants to recommend one... which 3-in-1 and 4-in-1s do you like?