Hi Scott, I have owned 2 of these cars.  I can tell you that they are
very trouble free and great, I mean really great cars.  You might want
to keep up on the lubrication of the front driveline components.  Have
the boots checked by someone who knows what to look for in terms of
wear beyond normal.  Replacing headlight bulbs is a dream, very easy to
do and good clear instructions in the owners' manual.  Also check your
coolant level for the radiator often.  I overheated one of mine because
of this.  Somehow I neglected to check when we were in a heatwave here.
No damage to the car but kind of scary.  Honestly with good
maintenance these cars will go a long time.
If you ever have to jumpstart your battery, I left the key in the
number 2 position for several days, don't panic if various accessories
don't work after the jump.  I mean vital accessories like door locks
and moonroof controls etc.  The low voltage control modules are not
fried, they will reset.  If you drive your car regularly it will reset
quickly.  I drive mine less frequently so it took several anxious days
and a panicked order for replacement modules before the "miracle" of
control module regeneration took place.  It was kind of spooky, these
cars are too smart.
One last point, you can safely, easily and economically purchase parts
for the S60 on the net, Erie Vo Vo, is a great resource.  Good parts
and great parts.  Any good experienced mechanic can repair and maintain
these cars.  Most of the complaints I read, and I read alot of S60
sites on the net, are dealer/service related.  Too high a repair costs,
prolems not fixed, etc.  Maybe it is the snob appeal thing but I live
in the sticks and my mechanics and myself take care of anything.  There
are some computer related codes that require dealer attention I hear.
Check it out first and save yourself money and grief.  Have fun with
your car and know you made a good, wise choice.  These cars are safe,
sexy and fun.
Carlos