I wear a set of Siemens Centra SP's BTE's (http://hearing.siemens.com/uk/04-products/11-centra/02-instruments-features/instruments-features.jsp#bte) .. Cost in Canada per ear:
~2400 for the hearing aid
~675 for fitting (mandated by the gov't)
~80 for the hearing aid mold
~1000 for the extra two years warranty
Total is about 7k for both ears.. The Ontario gov't pays for $500 per ear, so cost to me was 6000. It's my understanding the hearing aid cost in Ontario is set at the cost of the device by the govt, and the fitting agency makes the money on the fitting and warranties.
Ontario gov't will fully pay for a single cochlear implant should I wish to go ahead with it, I've already been approved.. At this point my hearing is still mostly better than a CI would give me (www.compwizrd.com/hearingtest), but should that change I might go ahead with it.
A decent digital hearing aid is much more than just an equalizer.
Mine shifts the higher frequencies down into lower frequencies, and leaves the lower ones alone.. I hear better in the lower frequencies, and almost nothing in upper frequencies, so the hearing aid is programmed to work with that.. if i couldn't hear lower frequencies, but could hear higher, then it should shift everything upwards.
It also amplifies differently according to what the input is.. soft sounds get amplified more, louder very little.. makes it hard to tell exactly how loud something really is, but deals with what i can hear.
Also has wind noise cancelling, feedback cancel, sharp noise reduction(sharp noises get smoothed out so they don't clash).. dual microphones.. it listens behind and ahead of me, and whatever is behind, is subtracted from what's in front, so that i don't hear background noise. telecoil link, remote control.. battery that lasts about 3 weeks.