Sony is making all potentioal PS3 buyers choice easier by discontinuing the 20GB and 60GB PlayStation 3 SKUs from the Japan market, leaving only the new 40GB slimmed down version. Sony's game unit said it would end shipments of PlayStation 3s with 20- and 60-gigabyte hard disk drives by the end of this month. Sony is pinning its hopes on the cheaper PS3 with a 40GB HDD that was introduced in Japan in November last year. Unlike the two original versions, which were launched in November 2006, the newest PS3 model lacks PlayStation 2 support, has two high-speed USB ports instead of four and has no super audio CD system. The company will "vigorously promote the expansion of the PS3 platform by further concentrating on the 40GB hard disk drive model," Sony Computer Entertainment said in a statement. The move comes as rival Nintendo continues to enjoy strong demand for the Wii, known for its motion-sensitive controller, outselling the PS3 three-fold in its domestic market last year.