S60R 2004 Vs. 2006
 

Reading around, it seems that 2006 is less prone to Collar/Angle Gear, transmision issues? So it it slightly, adequately, or significantly Less Expensive to maintain a 2006 versus 04/05?

How much would the following parts cost and average installation cost. I am trying to figure out the major expense when the car hits >80k
Timing Belt
Slave Cylinder
Angle/Collar Gear
DEM
Engine Mounts

Thank you