The Brother HL-3070CW is the best wireless printer available on the market. It is a Laser printer, that will give you a long life from your printer and toner. Wireless setup is a breeze with the included software.
There is no certain printer that is the best. I do recommend HP products and Lexmark product however. You need to go to an electronic store and look at what each printer provides and decide what you need out of a printer.