Stage height for the most part isn't going to come from your mids, it comes from the upper midrange and tweeters, which in a 2-way the tweeters will for the most part cover. In the midbass and lower midrange generally speaking your ears can't even determine "height", just left-right ques. The significant portion of the height ques are going to come from the tweeter in a 2-way. And following that the height has more to do with proper FR, proper time arrival and reflections, etc, and not necessarily the physical location of the drivers. If you sat in my car with your eyes closed I don't believe you'd be able to tell the speakers were next to your feet. As for width, you're only losing a couple inches in going from doors to kicks. Not enough to make a huge difference in width, although the ability to aim the drivers and get them away from the reflections/diffractions from being behind the door panel (as most people mount their mids) can often make a larger difference. In my car I get better overall imaging from the kicks without giving up really anything in width, and with venting to the fender airspace isn't an issue. But the main problem in my car with midbass in the kicks is I have a huge nasty peak that's generated. One of the things I should have done this summer was figure out if under-dash pads or something could have helped solved that issue but I haven't (forgot, dammit).....so for now I just let the MS-8 get rid of it for me.