Videophiles with a little money to burn now face a difficult choice: Should they buy a 4K TV or an OLED HDTV? LG has announced a $3,500, 55-inch OLED TV available for pre-order at Best Buy. While the price is still too high for an impulse buy, its less than a quarter of what LGs first 55-inch OLED sold for. And the price is low enough to make it compatible with 4K (aka UHD) LCD sets — helping determine whether well-heeled viewers want the highest resolution available or the best screen quality.