If you do decide to drop the coin on a pro make sure you really get someone who knows your type of television . Don't get some trunk slammer who does this kind of thing on the side or you could wind up with real problems .
The benefit of a true pro is clear with all the test and specialized gear they bring to the table . You will not find all of what a pro can offer in a set-up disc like sound and visions . But, hiring a pro leaves you out of the loop . Which I think is possibly the most important aspect in tweaking YOUR SYSTEM . You are the one that has to watch it . I say get a disc and enjoy the tweaking process .
There are several good disc out there to choose from which enable you to make substantial improvements yourself . Enjoy !