Headphones

Hi all,

I am currently in the market for two headphones, one is a set of in ear monitors, and the other is over ear headphones, specifically the FATFrequency Grand Maestro, and the Meze Empyrean II, My problem is that I can't seem to find anywhere that I may be able to try these headphones, let alone purchase them from dedicated retailers in the UK, the best I can do is have them shipped from the US, from a US company, like MusicTech, but obviously before I sink 5 Grand into audio equipment, I would like to try them out first, even though the reviews are outstanding to say the least. Does anyone here have any ideas where I can find somewhere to trial these two headphones? Maybe an event of some sort (if so when does this/these event(s) take place and where, preferably in or near London)

Any help at all is greatly appreciated! Many Thanks!!