Honestly, Dell laser printers are best I've ever used. Very good value, replacing toner couldn't be easier, setting it up for network printing was way easier than Brother, they're far more reliable than Samsung printers (constantly had paper jams) and I can print from my Android phone natively.
Without going into something really high-end, like a Phaser, the Dell printers are very much worth a look.
These are the features and changes added in Beta 4, specifically. There have been other changes added to the previous three betas.