19" x 8 RS6 style 5 seg wheels (PQ6)

I'd like to change the wheels on by Audi B8 Avant 3.0 TDI Q SE to the above.

Audi ones cost circa 500 each, with replicas around 450 for 4.

Concerns are quality if I bought replicas. Anyone any knowledge?

Also, what offset? How can I tell what this is/should get?

Thanks
Perry

I put replicas if these on mine and they were fine - quality was OK but I think 19s in general are to low profile. Offset was 45 or 42 and I had 245/35/19 tyres on them - this gives exactly the same rolling circumference as the standard 18s....