Not real familiar with the wear trends on your particular motor, but I would have your mechanic inspect the timing chain and tensioners.
Since the head is off, look at the valve guides and valve stem seals too.
Make sure the new gasket has the copper lining.
2009 ML350 (84K) - Family vehicle
2001 CLK430 Cabriolet (71K) - Wife's car
2005 BMW 645CI (124K) - My daily driver
2012 Mustang V6 (60K) - Daughter's car