^^ With better speakers the noise will add up for sure. But If you get the NAVI out; you will need VTi's 2DIN container dash....Or else try looking for Oriel's CD Changer.
A shopkeeper near my house has Oriel's 15" rims; Made in Thailand. He has quoted 45k claiming that these are "same" what Atlas is offering. I checked myself and his claim appears to be true. What you guys suggest should I get one pair for my poor VTi?