On my 01 V6 only time I had my plugs with coils changed was at 100,200 miles (now 139,840 miles). Use the OEM stuff, you don't need to change gasket on the V6. For the brakes I use the ceramic brakes from Pepboys and they are GREAT, no noise and zero dust. Some people used em and are not happy with em, but these are my 3rd set, I had EBCs before and didn't like em, they were dusty.
Other than that, I use Mobil 1 5-20, changed evey 5000-6000 miles, Mobil 1 filter. If your engine is working fine I wouldn't worry about the spark plugs. They are king of hard to change, you need to remove the intake manifold to get to the left three.
Other than that great car with nice handling.