@diminishedchord If you are not absolutely sure how your hearing condition is going to impact on your experiencing the full Audio Frequency Range, typically 20 - 20Khz.
You might not be too impacted as realistically, recordings are commonly produced between 40K - 18?Khz. It might be worthwhile having a hearing test, as can let you know where the frequencies are not being detected as a audible sound.
If hearing limitations are discovered, there are options for Speakers that are not going to break the bank.
The frequency Range you are asking to have a notable performance will be found in ESL Speakers and not many Cabinet Speakers are able to do what a ESL does across this frequency.
With ESL's there is the efficiency hurdle to get over, I use my own ones with Low Watt Valve Power Amp's and have not felt the ESL is compromised.
I also have developed a interest in a alternate speaker design, I have supplied sample materials to be used by a skilled producer of this design.
If you are interested in an alternative speaker design, and are liking a non-intrusive design, which will be a project that is not too demanding to create. I suggest a investigation of the Link and take the time to listen to some of the recordings listed below and the more recent additions put out by those who have working Speaker Models.
Page 116 – Post 2302 - Page 117 – Post 2303 -2321 – 2332 – Page 171 – Post 3410 (Interest)
Page 172 – Post 3421 (Interest) – 3423 – 3427 - 3429 (Interest) - Page 173 –
Post 3447 (Interest) – - 3459 (Interest)
Post 4726 is a Video using the DML Design as a PA
Post 5622 has a recording of a Panel in use as a Mono Set Up and from Post 5640 - 5642 there is a Stereo Recording and further discussion on the merits of the material in use. ( My supplied Sample Material)