I'm looking to buy a new Q50 or 335i xdrive once my lease runs on my G37x in a few months. For those that have driven the Q50, how does it compare in terms of road/wind/engine noise to the late model Gs? I love my G, but one of its drawbacks, I think, is that it's a little rough around the edges. How does the Q50 compare to the bmw 335i in this regard? I found the 335i to be a bit more polished than my G.