It looks like Mio has seen fit to give its DigiWalker line of GPS units another bump in digits, with the company today announcing its new C523 and C525 models set for release in Japan later this month. Both of those boast 4.3-inch 480 x 272 displays, along with 2GB of internal memory, an SD card slot for expansion and, of course, all the usual PMP functions, with Windows CE.NET 5.0 running the show. The main difference between to two, it seems, is that the C525 packs a built-in extendable antenna for those that like to stray from their vehicle, along with a few differences in the pre-loaded maps and software. Look for each to be available in Japan on September 26th, setting you back ¥56,800 apiece (about $500).

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