I have some Shure SE535s with custom molded earpieces from these guys:

http://www.hearingprotection.co.uk/i...=60&Itemid=117

I was sceptical about the molding but £80 and a trip down my local Boots followed by a 3 week wait was well worth it! The custom molding definitely proves more isolation than the stock earpieces and makes travelling, even on planes, a listening pleasure

So, what I am wondering is if anyone here has experience with ACS' own phones? I can't see any threads referencing them using the search.

Apart from Goldring, they must be one of the only UK headphone manufacturers around! Although I am guessing they buy in the drivers.

Any thoughts?