Paris Dining questions

[StevieG]

I'll be in Paris in mid September, most likely staying in Les Halles in 1er Arrondisement.

One night I would like to treat myself to a good dinner, in the €150 range. Near to the hotel is preferable.

I found Gerard Besson which has a Michelin star and a tasting menu for €125, which sounds perfect.

Does anyone have any experience there or other recommendations for something similar?

Also, one night I will probably like to play at Aviation Club, can someone recommend a more moderately priced bistro or brasserie close to ACP?