I have a couple of questions,

I had owned the SD1 and was considering the purchases of a new Ketron, since I miss my Ketron.

1-Where can I hear a demo of the EXP vs standard sounds
2-will the SD1plus exp allow for midi files to be selected and played without having to switch to play mode like the old SD1?
3Can this be done on the SD5
4 which is the better or morde advance keyboard, or is the SD5 a scaled down version of the SD1Exp?
5 is the sound machine the same in all?
6 any reason to go with one or the other?