ClieOS also can't stand listening to them for more than 15 minutes which myself and a few other EX700 users tend to not agree with as much on. The soundstage is definitely NOT comparable between the SA6 and the EX700s. The EX700s has a much better soundstage that also feels airy. It's what a good pair of full sized phones would sound like. The SA6s did not have that quality to them, the details were excellent on the SA6s but the bass was anemic and the sound felt like it was emitting from the center of your brain instead of the sense of hearing sound coming in around you. BIG difference. ljcii, you hit the nail on the head, thus I said that the soundstage wasn't all that great on the SA6 while it was excellent on the EX700s.
By the way, those ports, I've tried all the ports that came with mines and the difference in sound was quite minute. That airiness that came along with using the Bass + port, it also created a less refined bass response and did not really add much in the bass impact department (where it actually really counts, for example, Etymotic's actually have very accurate and ample bass but they are lacking impact thus the overall sound become sterile and cold). A pair of phones can hit all the notes perfectly but you have to listen to it as a whole, this includes warmth in the sound, if there's a lack of warmth, you're really missing a big part of your music.
It's funny how ClieOS' review of in-ears has become the standard as to which many head-fiers have followed. I've tried and owned many pairs of in-ears and full sized phones and I'll tell you this right now, I sold many of them and quite a few are in storage, the reason I bought them initially was due to the reviews on Head-Fi. I've grown old and wiser and now only look at what's coming out and I dare to experiment with new phones and equipment regardless of the reviews on Head-Fi because if I was to go by reviews on Head-Fi, I would end up with even more equipment that I don't really enjoy.