Excellent post SRGT
IGood facts covered there about cover.
For instance my current insurer won't allow wheel spacers. They're quite happy with engine and wheel mods but spacers are the work of the devil in their eyes.
Anyone want a mint set of Sparco spacers?

Anyway, back on topic and very good points in the other posts in this thread.
I meant to reply the other day but got waylaid, however itavaltalainen covered much of what I was going to say.
There are castings and there are castings.
When you look around UK wheel 'specialists' you'll see a plethora of Chinese reps.
Have a look on German and other Euro websites and you'll see none in many markets.
The reason being, as posted above, these wheels haven't passed stringent safety tests.
I'm sure they're not all death traps but they won't have undergone stringent and expensive TUV testing.
But I'm not anti replica. Far from it, just be careful.
Having safety stamps on the back of the wheel is a good pointer as to how well made the wheels should be. Look for JIL or JWL which is an internationally recognised standard.