The Concorde Lafayette is located at the NW end of the Champs de Elysee, highlights are free breakfast, cheap(er) beer at the irish pub across the street, metro and train station one block away. Also the airfrance coach drops off right out front for 14 euros non stop from the airport.
Montparnasse is about a mile and half south of the river and latin quarter, in a neighborhood with lots of bars/ restaurants, etc. Metro station is across the street. Takes a lot longer to get here from the airport, and is more expensive if you are deviating or on vacation. Rooms are nicer than the concorde lafayette and bigger.
Neither has a location like the Letitia, but now that it has been remodeled, is really expensive, and not an option for us.
My plan is simple, I am going to go with the cheapest room and walk or metro where we need to go!
I'll let you know when I book something and what the rate was. I hope I can get something like check6 and mach got for less than 100 e a night.