+1 for the DQ4.
I have been on an absolute ChiFi tear in recent months, purchasing several hyped iems - P1, T800, S8F, S8P, FH7. All have been great, however, DQ4 has impressed from the very start more than the rest. When talking about value for money it gives the most in the package compared to the rest and especially at it's price (180?What).
The tunable switches give it a versatility unlike any other. Not that they make a huge difference, but since the sound signature, texture and separation are already so good as an all-rounder iem in the stock tuning, the switches just take it a level further. Bear in mind I am still in the honeymoon period of the first 48hrs, but I think these are real keepers and very difficult to fault in anyway.