anyone here with an 05 w/the nav system or an older model upgraded to the 05 map disc (called "map release 3d")? Just looking for feedback on the software and if there are any real improvements to the data. also, since it's called map release 3d wondering if they've gone to 3d views and such on it. any feedback is appreciated. it's a pricey upgrade and wondering if it's worth it. thanks in advance.