For me, the extra features of the Explorer are not worth the extra money. The trip planning I would prefer to do on the computer, the compass/accelerometer function, detailed logging I have on my iPhone, and the others features do not seem important to me or are otherwise available with the iPhone. My Older unit (I call it the brick) does the same as the SE, except that there is no display, so that you really need the iPhone for it to have the maps and messaging function. If I were purchasing new I would just go with the SE.
Got it - ordered the SE.
