you can get the KYB GR2's for pretty cheap (about $60-$70 a piece) which is a great strut IMO, they are not adjustable... but a hell of a lot better than ridding on stocks and worrying about them blowing out. Plus the ride is 10 times better! I know someone that put a Prokit on their stock struts and blew 2 of them the next day.

with 115kmi on the car, chances are the lower bolts on the rear struts are pretty well froze up, unless the car has had the struts changed before. If they are froze up, you'll need new bushings ($12 a piece, only from honda) and the bolts ($9 a piece, again only from honda) plus some other parts.

I got my rear struts/springs installed for me because of those lower bolts, they charged me $110 (2 hours labor, cause I knew the guy) and $60 for the parts from honda.