I`m surprised why don`t you, UK guys, simply move to the US...
you`re a native english speakers, have some kind of a common history with the Big Brother...though I`m not sure about the mutual love (just watched 51st state with S.L.Jackson and Robert Carlyle)
and the electronics is sooooooo much cheaper in the US...
damn overpriced EU, shame on it...
but seriously, as the WhatHifi guy said in his post, apart from the warranty and coding issues there`s nothing you should worry about...
and the WhatHifi guy`s explanation of voltage converters and their supposedly poor service is pretty poor, too...
modern heavy duty, continuous step-down voltage transformers are the BEST way to make that stupid US-EU cost differencies disappear...they`re rigid, reliable and cost between 80-200 GBP...
I have Pioneer SC-57 Elite AVR (US equivalent of top-line SC-LX85) which I got new in box for hilarious 1300 USD (800 GBP)...as opposed to cca 1700 and more GBP here...
plus a 1500W heavy duty step-down voltage converter and it all works flawlessly...
the frequency is absolutely not an issue, unless you`re using some kind of a clock device (US 60 Hz cycles a bit faster than 50 Hz EU)
which neither AVR nor bluray player stands for...the BDPs even have both 50/60Hz native freq, all over the world...
it`s my 3rd 120V/60Hz AVR over the last years, I can guarantee you there`s no problem with voltage if you use it that way in EU...
I have a friend working in Pioneer EU headquarters in Belgium, he totally confirmed it and encouraged me to use such stuff intended for 120v/60Hz market...
I suggest the WhatHifi guy to first think and then speak..
..and to not be bullsh....ing us with the casual domestic-stuff-only-as-they-pay-me-for-saying-so cliches