One of the benefits of having a pro do the work for you, if you have the coin, is the mental feeling that it is done right.
I myself enjoy researching, calibrating and tweaking on my own, but it becomes a constant thing because you always have this feeling in the back of your mind that you could do it better if you just go back and do it again. If I paid the big bucks for a pro, at least I'd probably be too scared of wasting my money to go in and play with it further. Well, sooner or later curiosity would overcome my fears.
