Exhaust Resonator, How much hp would it take away if I put one? Options

[Jeunesse]

Hey guys... I need some help here... first of all, I am getting tired of the loud exhaust that I have right now and thinking of getting a resonator. I have a 2.25 straight pipe with a CLA muffler (I bought the car with the muffler in it). I am looking to change that in a year or two but it is not in my priority right now. Like I said I am getting tired and annoyed of the sound loud... it doesn't have that ricey sound but it just annoys me and my wife. So, I'm thinking of getting a resonator but concerned about the HP drop. I know that my car isn't that fast enough too but why whould I go slower if my car is already slow . If anybody could just tell me if it's worth getting the resonator or maybe just point me in the right direction please. Many thanks to all......