There are no real dogs at this price point - the above poster is correct - it is all about signature. 3-way CIEMs often are "fun" signatures with emphasis on upper and lower frequencies (V3, N3, 3A, JH7....) you really can't go too wrong - I'm sure I'm missing mentioning a CIEM that is garbage, but it doesn't come to mind. Any one you pick is going to be superior to what you have been listening to - at this point, I would let logistics enter into the equation - all things being sort of equal, which transaction will be the easiest? Which refit will be the easiest should you need one... IMHO
EDIT: If it was me, I would probably buy the >1yr old UM Miracle in the FS thread and reshell the bastard!
yeah, I think this is the one of the best options if you are limited in budget, but to me the tuning is questionable for reshells. I saw a video of 1964 ears, and recall part in the clip where there is a guy that is verifying the FR, making sure it's tuned right. Does Inearz do that? Also, how would reshellers other than UM, know the FR to tune to if they have a capability?