Should I go for the PANNY VIERA 50E (ED) or wait for the 500E (HD). The 50E has a vertical res of 480, which is good for NTSC, while PAL has to be downscaled. The 500E ha a vertical res of 720, so both NTSC and PAL have to be upscaled. Are there any better plasma TV? Like the Philips with the new Pxel Plus 2?