Howdy Tim, welcome to LOST!
I did the job myself, because I feel the same way (no trust) and like to do things my way. BTW, I follow the TB change interval as stated for US vehicles. Does not make the least bit of sense to go metric, I figure it's only a way to make people spend more! So, 160000km for 1st change, next should be at 320000km. If water pump turns OK, wait for 2nd TB replacement (or just replace the pulley, I believe there were few mentions in the forum).
My only "good" experience with a dealer was South Bank Dodge in Ottawa. Dean Martin was the service advisor I dealt with, very professional and courteous, actually! Thing is, as with pretty much any other dealers, their lack of knowledge of the VM Motori engine reflected in my Jeep spending almost 2 months there! On the bright side, I figure the mechanic who worked on it must have gained some experience, as I know he also spent a lot of time working in conjunction with Chrysler Support (

), trying to figure out the problems.
If you are the least bit inclined in performing mechanical work, I strongly suggest you find time to do it yourself, far more rewarding (and less $$$), and really not that complicated, especially considering the wealth of valuable information provided by this excellent site
Good luck!