Regards buying from china then yes there's good and bad, but that holds true for lots of country's this one included.!
If you want a recommended supplier one that I've dealt with for years and bought £1000's worth and sent literally hundreds of people to then Chai @ linearmotionbearings is your man

Can't argue with that Jazz but at least if you have problems with a UK supplier then it's easier to try & get hold of them plus it is generally easier to get after sales support from a uk supplier. Before I spend a lot of money with any supplier I generally look around & speak to other people who have dealt with them if I can plus it's easy enough for me to give them a ring myself & ask any questions I may have. Will have a look at the supplier you mentioned thanks, having looked at the prices from a couple of Chinese sellers I can see what you mean by the difference in price not being huge. Couldn't find anything close to those sort of prices from suppliers in the UK.