i have extensive experience with orignal toyota rims, work sp1 racing rims and now with these Vossen concave CV5s . they are the best quality available on market yet and they are very very good looking too. and yes orignal american vossen start from 18 inches.
but these are better than locally available lenso rims or any other rims for sure. u can see them on my thread.
even the detail in placing the air filling nozzle speaks for itself since its hidden on the inner wall of the rim to ensure proper looks :).
New Corolla AlhamduLillah (HS1 Package with mods)