I have made the decision to take the plunge on a pair of customs now that my sister has just about stolen my pair of Westone 3s, although it's going to take a while to gather the funds for the whole process. From what I have read, I believe the Heir Audio 8.A fits what I'm looking for the best (so I'm rather upset that the amazing sale for the Wizard's birthday is now, and why could he not have been born a few months later! :/) If anyone has experience of the Westone 3 and can compare it to a CIEM of any kind please feel free to comment.
However, there are plenty of horror stories about refitting in the forums. What really concerns me isn't the time taken to get a properly fitting pair - it's whether you end up paying customs every time they're re delivered. I live in the UK, so customs is 20% or more I would imagine. If this is the case, then ACS would definitely be the way to go as they're a UK company.
So my question for those poor souls stuck in refit limbo - have you had to pay customs more than once on your CIEMs?