At 68 I decided to go to Bay Audiology (simply because I thought I should take up AA's offer of free secondary testing!) a few weeks ago. Didn't really thing my hearing was "bad" at all, but was a bit surprised to find how much my mid-high and high frequencies had dropped off (obviously some is expected as one ages). Long story short, I have ended up with some top range Amplifon (by ReSound) RITE ones - as other have noted, prices are pretty outrageous!). I'm still getting used to them (left them behind on a recent 4 day trip to walk Abel Tasman track) but the amount of extra high end sounds I am now realising I missed is significant. As others have stated, bird calls, insects and other higher frequency sounds are a refreshing improvement!!
I found Bay Audiology great to deal with here in Kapiti - the added benefit is I can go in for adjustments at any time and have three months in which I can swap out for other types if not happy.
Probably the other thing that convinced me was looking at the scientific literature around the links between hearing loss and increasing risk of cognitive decline/dementia, which is reasonably strong - anything I can do to help stave that of is definitely not a bad thing :-)