Tone controls- to use or not?

Thanks to years of playing in bands, and more recently working in a noisy environment, I've come to the sad realisation that my 40-year old ears no longer have their original upper frequency response. Adding a bit of "treble" on my amp's tone controls helps, but I'm normally loathe to use these controls.

Should I be looking at changing my setup to incorporate "brighter" sounding components, or is adding a little treble with the tone controls legitimate?

My system is a Cambridge 640C player, NAD c720 stereo receiver (based on c320 amp) and B&W DM602 speakers, Monster cable IC's and heavy guage "Kordz" (Australian) copper speaker wires.