Got mine going on about 8 years ago now, and love it. I originally got it to haul my ass to and from university....so the v8 seemed a bit much. Don't get me wrong, the sound & power of the 8's are definitely intoxicating, but for the city jaunts I do, the I6 has served me incredibly well. The only complaint I have is it can, at times, feel a bit under powered.
I won't be dumping my X anytime soon as its basically a necessity for our winters....and as for the 3.0 power; well, there's always ways around that too.

all depends what you're after.