My belief is that I need IEM's that have:

High isolation (minimum 35dB attenuation)
Warm sound with a soft treble
Highly transparent
Good resolution

To be used direct from iPod/TV
Maximum budget £375

My hearing now has no dynamic range.

I am unable to tolerate sudden increases in volume and I seem to be less tolerant of higher frequencies (especially if they are distorted or just too loud or too sudden).

In my case this is caused by Hyperacusis which is a part of the Acoustic Shock Disorder (Syndrome).

Does anyone else unfortunately have a highly reduced tolerance to sound?

If so, have you found an in ear monitor that not only attenuates enough (so no need for earplugs) but also can play music (or speech) without pain?

It might be the case that IEM's are just going to be too close to the eardrum for me. To give you some idea bedside radio needs to be on volume level 1 and the TV on level 3 or 4.

I will be very pleased to hear from you.

Minstrel

(To my knowledge) your first requirement of sound attenuation basically leaves you two brands to consider for universal in ear monitors: Shure (with the right tips ~37 dB attenuation) and Etymotic (~42 dB attenuation). Having not owned or experienced either of these brands I cannot point you much further on what to get. Good luck on your search.

Thankyou Fadem

To greatly reduce dynamic range in audio, I would strongly suggest using a software filter to compress the decibel range (not to be confused with compressing the audio file's binary data, like with MP3/AAC). No IEM/headphone is catered towards making loudness uniform irrespective of how it's supposed to sound.
 
A free program like Audacity can compress dynamic range, and I'm sure there are other tools, maybe something like Power Amp, to batch-filter your music.

Thank you soundstige

I have a Gen 6 iPod Nano. It can lock the volume and you can select preset FR but that seems to be all the relevant stuff.

Sony's new A series portable music player has a dynamic range suppressor which sounds useful.

Thanks again