We have stainless duals in our Affinity. I really like stainless sinks as there is some give if you drop something. You would get the same thing with plastic but it would be white. Our two bathroom sinks are corian, so I guess those would be considered plastic. But understand what you are trying to say about plastic not looking up to the level you want. Then again, we have a really nice house with vinyl hung windows. At first I did not like them nearly as well as our privevious house's wood. But after 12 1/2 years I would have to say that from a performance standpoint the vinyl windows are way superior to the wood ones we had before. So maybe a plastic sink works better but looks worse.
Country Coach 42' Affinity
2013 Jeep Wrangler Unlimited