With the right fit and source , Solaris has great bass sure there are iems out there with more mids , but "thinish" isnt true... maybe you had a bad fitI dis-agree. I find the Sony Z1R to sound way better than the Solaris, Solaris with its thinish midrange and lack of bass.
With Solaris as the starting point, what would be some superior hybrid IEMs (no price limit) that can match the amazing Solaris soundstage? I have no doubt that I'd love the Z1R's low end, but in general, I prefer to keep dynamic drivers as far away from the high end as possible, and from what I've read, I'm pretty sure I would prefer the the Solaris's BAs over the Z1R's DD.
EE Legend X has even better soundstage to my ears