I didn't even realise Oreck stopped selling in the UK. It's probably because their vacuum cleaners were quite disturbing XD (personally I find them disturbing, no offence)
They were probably too loud to pass the EU regulations.
Kirby are very lucky they don't sell in high street stores because they would have bitten the dust too!
Yes it was the Magnesium they were selling over here. It has to be under 80db in the EU not sure how loud the other models are but being direct air they will be very close to the limit I'd think.