I wrote this post a while back and have had plenty of time to compare and play around with all three iems. In order, this is the order I use the iems in the most: FXZ200, CKS1000, FX700. They are all great iems and each has a different tone and sound to it. I am using the IE80 and the ASG2 mostly. The Westone 3 is also a nice iem for the music I listen to. Westone 3 is primarily used for working out/exercising. The IE80 is my main iem, used to mix music with, use on my laptop, and use on my iPhone. The ASG2 is still being broken in. It is a unique sound, but a very good sound at that. Only issue for me is the fitting and cord, which are two big issues after sound. However, the ASG2 is in a different price bracket compared to the previously listed iems. I'd say CKS1000 is the most balanced in the mids. It has a great overall sound. The FXZ200 is harder to drive, but does have subwoofer type bass when needed. The XB90EX has amazing quantity of bass, but not quality elsewhere. The FX700 isn't really my favorite due to two factors. The short cable and also due to hints of sibilance. I own a bunch of iems so I have the ability to tip roll and get the right tip/sound I want/desire. No matter what I've tried, the FX700 is always bright in comparison to anything I own or have used. Squeaky sharp, like cutting a sharp knife on a dry plate. The original topic question was iems with huge soundstage and bass...the ASG2 and IE80 are what I've been looking for.