the only experience i have with ET wheels is the unilug style way back in time, and a set of modern ET3 reproduction wheels for my hot rod in 15x15 size. [big "D" window slot wheels used on top fuel and funny cars in the early 70's]
the unilugs were just awful, especially when the nuts came loose and the washers goofed up the holes they sat in.
the reproductions i had custom made for my application, built in california. while somewhat expensive, they are VERY nicely made and have only .004 TIR, which i find astounding with a wheel that size and backspacing welded up to order.
hopefully, the new style ET's out there are as good as the reproductions i purchased.