I just had an oil change done on my 2003 OBS.  The mechanic made sure
to mention that my timing belt was due, but also mentioned that the
engine was noisy (lifters.)

In the factory timing belt service, do they adjust lifters?  The
website says "inspect valve clearance."  Does this mean "listen for
ticking noise?"  Am I going to get a call from the dealer saying:
"your valve lifters need adjustment, it's going to be an extra many
dollars because we have to take the valve covers off blah blah blah"?

Any thoughts on doing a timing belt service at Subaru vs a shop that
will strictly do a timing belt?  The local guys can do a strict belt
replacement for much cheaper, but I don't know what else Subaru would
do at the same time.  Is there a list of things they replace handy?
Looks like not very much other than the air filter.