Thumping strut/struts on '93 90q & stereo noise

[Boris813 at aol.com]

--
[ Picked text/plain from multipart/alternative ]
I just bought the car and there is a definte thump up front when hitting
bumps.  The pre-inspection noted it probably needed new front strut
cartridges.  Doesn't appear to affect handling, but it's a bit annoying.  I
seem to recall seeing something on this list about strut caps that wore out
and thumped .  The shop quoted me $550 to do the front struts.  Am I correct
in assuming I'd need to pull the struts anyway to replace the caps and does
it seem likely the strut cartridges would need replacement at 70K miles?

Also, any thoughts on fixing an RPM buzz in the receiver/CD.  Original box
was replaced by PO with a Rockford Fosgate unit.  The store he bought the
unit at wants $70 + installation for something in the line that will suppress
the noise.  Not the end of the world, but it seems a bit high.  Are they
jacking me around?

Thanks,
Norm