KZ ZS10 seems to be getting good reviews. Still waiting for mine.
Update on MEMT X5 and FXT90. My fiance received her MEMT X5. She likes the sound signature of FXT90. So that's pretty much how I perceive. FXT90 has better soundstage and it's a more composed iem overall. However, she finds MEMT X5 more comfortable. Sure enough, MEMT X5 are indeed the most comfortable out of the bunch I have. Low profile makes it perfect for late night bed time listening.
Out of MEMT X5, Rock Zircon, Einsear T2, FXT90, KZ ZSR. I find reaching out to MEMT X5 most of the time for long duration listening. MEMT X5 has slight midbass bump. FXT90 is better in detailing and soundstage when compared to MEMT X5 but can be fatiguing for extended listening. FXT90 is more balanced. Dual driver tuning is fantastic. Coming to the most fun IEM but also one of the least comfortable, KZ ZSR it is.
Rock Zircon is ok. It's V shaped signature may be good for some people but the detailing ain't that great. Bass is good. I do not find it more entertaining. Einsear T2 is more towards neutral sound, but the narrow soundstage is not complementary to the signature. These two iems are not much to my liking for the moment.