Parisian Hotels

I have spent the last couple of days looking online for a reasonably priced hotel in Paris. I am coming to the conclusion that it is an impossible task. It’s not that there is a lack of hotels but that there are entirely too many.
I’d like to stay in a quiet neighborhood near the center of the city, in a double room at a 2- or 3-star, small hotel for under 175 Euros a night. All the places I was most keen on are booked for the nights we’ll be there in October. So now I’m faced with at least two dozen runners-up and a level of flexibility that puts me in the range of hundreds of hotels. It’s mind boggling.
So I’m taking recommendations.
Anyone have a favorite Paris hotel? Tell me about it. Why do you like it? Where is it? Does it have a web page I could peek at?
I guess if I wait long enough, I could discover the joys of Paris’ parks after dark.