"but I will be purchasing our tickets into the city"

I will be coming to Paris May 25 and staying at Hilton near Arc de Triumph. After a 7 hour flight overnight flight from JFK, I just can't imagine waiting in line to buy tickets for transportation into the city. The taxi runs about 50 euro, the train for 2 people around 30 euro. 20 euro is about $30 american. I just spent $2000 for plane fare to get to Paris and to add $30 difference for covenient 1st class transportation into the city makes sense to me, especially with the luggage and the tired factor.