My thoughts exactly. While the XB700 isn't the most refined can, it is surprisingly well-detailed considering the ocean of bass that goes with it. I think a more refined version of the XB700 is what I would like. I have tried the D7000 and wasn't really all that impressed with it (my apologies to MLE). In fact I actually liked the Shure SRH750 DJ more than the D7000 (not placing into consideration the lousy ergonomics of the Shure). Not that the D7000 was bad, it was great actually, but I guess I'm one of the guys who is influenced by price in the sense that, the more diminishing returns I get, the less I like the product. I just wasn't blown away by the D7000 like I was with, say, the LCD2.
I wholeheardtedly agree with RPGWizard, the XB700 isn't just about bass. Much like the Turbine line which is surprisingly popular on Head Fi, people are into this can because it has that monster bass but still gives a pretty good rendition of the rest of the frequencies. And that soundstage.
I would *really* love a better version of the XB700. Something with the same sound sig, but with just more refinement and detail. was hoping the XB1000 would be it but from what I'm reading apparently it isn't, what with the mids.
I am still thinking that a properly amped and tweaked XB1000 might be the ticket, though. Our problem I think is that not too many of the owners right now have the right amp to drive this monster. I really hope to get one soon, I was supposed to buy one but while I was building my warchest the guy selling them changed his mind.
People need to remember they are only costing $80 (I'm from europe so paid only 65 EUR which is even cheaper when the 23% VAT is taken into account) so you shouldn't expect miracles SQ-wise but among the bassheavy headphones I've tried in this priceclass and a bit above I find them very good for the price. If it was all about bass they wouldn't be as popular as they are. I'm sure other XB700 owners can relate to this. I personally sold both ATH-M50 and Beyer DT770 Pro/80 which are like 140~150 EUR here after listening to XB700 & XB500. No they don't have Grado mids & highs forwardness but not every1 want that either.
I can't speak for everyone, but I do know their target audience and the limitations that often come along with a smaller price tag. I think they do amazingly well despite all that. I'm just wishing that they were better while keeping the same basic sound sig. I love the bass on them. The quantity is clearly far more than neutral, but I think its of good quality as well. It also goes far deeper than any full size headphone I've personally heard besides the LCD-2. (I haven't head the XB1000s though. I'm awaiting its US release.) The D7000 isn't even in the same league of extension. There's just nothing else like the XB series that I know of.