My DD11 also wears hearing aids....at some point she may be a candidate for an implant, but we aren't there yet. BUT, let me point you and your sister to a great website and listserve for parents of kids with hearing loss:
http://www.listen-up.org/. I have found it to be a warm, comforting and highly informational place. There are lots of moms with kids with implants, hearing aids, and everything inbetween. It has been my solace as we have navigated the hearing loss issues with DD....she has multiple issues- auditory neuropathy, otosclerosis, a cochlear fistula and mixed hearing loss....and last night she blew another ear drum out (back to ENT tomorrow- pixie dust that it will repair on its own- it's already been rebuilt 3 times!).
DD11's friends with implants (some just 1, some 2) do great. She is mainstreamed and so are her HH friends. One of her friends has 2 implants and is a terrific cello player (HE must practice, unlike DD!). Implants
can be a miracle....but it is a
VERY personal decision.
Try out the website and the listserv.....they are even more friendly (okay, as friendly) as the DIS!