Agree - have to try the Maglev at leas once
But in this case...go for the limo, much more comfortale especially when you have lots of lugguage.
One more thing for consideration; there is a lot of road construciton going on now and effects (most of the time) more in the direction towards the airport.
Why you dont do both ways; to city with limo and to airport with Maglev
Enjoy!