A new value-priced line of 4K Ultra HD LED-LCDTVs launched this week under the Westinghouse brand on Best Buy.com. The complete 2015 line will include six models in the 85- ($6,999.99), 75- ($3,999), 65- ($1,299), 55- ($799.99), 50- ($699), and 42-inch ($499) screen sizes, Westinghouse…