IMHO the e70 4.8i is not an "is", therefore it is not as sporty as the e53 4.8is. Obviously there is a technological gap between the two but until BMW offers an "is" (or an M) model, I would not like to trade up...It's like going from a e46 M3 to a e90 335i coupe...I'd rather wait for the e90 M3
