Newegg offers preorders of the Samsung 28" 4K Ultra 2160p LED-Backlit LCD Monitor, model no. U28D590D, for $599.99 with free shipping. That's the lowest total price we could find by $90. It features a 3840x2160 native resolution (four times that of 1080p), LED backlight, two HDMI ports, and DisplayPort. It's due for release on April 25. Deal ends April 26.