I'm looking at the Panny RP56 or the Toshiba 4700. I want to be able to play back some or all of the available DVD writeable formats. Anybody know what formats are supported by those two? Also, I'm looking for some info/reviews on the 4700. If you could point me in the right direction? I know that the RP56 plays burned VCD/SVCDs but I'm not sure about the 4700.