I totally agree with all other posters.. I wouldn't stay in a RS hotel myself.. and I have taken a RS tour and loved the hotels we stayed in , but no , romantic they were not.. and funnily.. the one we stayed at in Paris is not in his guide book or in the area he pushes so hard ( 7th).
I will suggest you are going at super busy time.. so book sooner rather then later. I book hotels with good cancellation policies.. never pre pay.. and that way if I find something better in coming months I can switch.. and still have a bird in the hand so to speak.
You haven't mentioned budget . . so I am at a bit of a loss. but will assume under 150 euros a night or so ?
I guess my big thing would be to get a hotel in a romantic area and convenient area. I prefer the 4th, 5th and 6th for first timers. Walk to many sites etc.. cute narrow streets etc.
I will say out of hotels you mentioned I vote for your hubbys choice.. Hotel Latour Maubourg.
As I said, June is super high and super busy season . One thing to consider, if you are in Paris on June 21st they have an amazing music festivale all over the city.. the Fete Musical.. there are bands and groups performing all over.. on the streets, in concert halls and parks.. street performers and pros.. lots of fun.
Also you could consider an apartment.. I know one that would be romantic and cheaper then a hotel .. in a great area. Its likely gone though.. but you can try looking.
VRBO 30505.. the owner also rents it through Parisbestlodge.. and I met and rented from him.. great guy , keeps his places clean and pictures ARE what you get.. I viewed three of his units... all clean and well kept and his english is perfect and he is a lovely man,, his name is Thierry.
Another hotel to look at but a bit pricey for me was the Hotel Aubusson..