I had a set of IForged Evolutions on my Z-06. They were really nice rims. I've got a set of HREs on my Viper now. The HREs are better quality, finish, etc., but the IForged were nice too.
The main problem with them was customer service. They take FOREVER to make a set of rims, from my experience. In fact, I waited over 6 months to get my set, although I had one of the first two or three sets ever made for the C5 Corvette. I don't know whether they've made a set for a Viper yet; if they have, I haven't seen it.
Christian