10 years ago I had a 28" waist and £800. I walked into Practical Hi-Fi in Bolton and came away with a new pair of B&W P5 speakers. Now, 10 years on, I have a 36" waist and a pair of B&W P5 speakers Over those ten years, I've loved my speakers to pieces and have never felt the need to change them despite being the sort of person who does constantly upgrade. And then.......... I had an accident with one of the tweeters (physical damage) and had to order replacements. I was staggered by the difference in sound!!! Just like you don't notice your kids changing over the years, neither do you notice the fall-off in performance of your speakers. The new tweeters simply knocked me off my feet!! It was like someone unblocked my ears! Speaking to other hi-fi nuts, it seemed to be a popular misconception that speakers don't really age, but that's not true. Any mechanical device will tire. Just consider the voice-coils for a start - they're a mechanical device which cause the speaker cone to move backwards and forwards hundreds of thousands of times of the years. Eventually, those movements will not be as quick. Effectively, they'll be tired and will give a lack-lustre performance compared to what they were like when new. So if you have a fabulous pair of (old) speakers that are dear to your heart, consider buying some new drive units from the manufacturer before its too late. Fortunately, B&W carry decent stocks for discontinued models.