Look for stores with closeout deals on a pair of RF-7 II and matching RC64 II center. The new mkIII versions are now out so you should be able to save a lot on the discontinued model.
Those will absolutely blow away what you have now for what you are trying to achieve. It will unfortunately worsen your hearing loss however.
Also, since you say you are hard of hearing, are you sure you are good with noticing spacial cues etc from multiple locations? Not sure if you will truly appreciate what Atmos has to offer or even 7.1 — might be better to spend that money towards better speakers, or more importantly, better subs! (Think JL Audio)
Those will absolutely blow away what you have now for what you are trying to achieve. It will unfortunately worsen your hearing loss however.
Also, since you say you are hard of hearing, are you sure you are good with noticing spacial cues etc from multiple locations? Not sure if you will truly appreciate what Atmos has to offer or even 7.1 — might be better to spend that money towards better speakers, or more importantly, better subs! (Think JL Audio)