lower quality as in the finish is pretty poor, I had mine powdercoated after about 18months as the laquer on the polished lip had begun flaking & coming off, I guess they're fine if you live in sunny California where they'll never see road salt.
They're also not particularly light, but not too bad.
I don't know what widths they do them in, mine are 15x8J, with 0et offset. By fitting narrower tyres (like 195's) you can fit them under stock arches but then you may find it affects the handling a bit.
Either way you're best off rolling and/or flaring the stock arches to give you some clearance.