I think it will be night and day difference! Report back after you have had a chance to watch a good bluray. Watch the animated movie coraline, and you will be blown away by picture quality! Try 9 as well.
Report back after you have had some time to watch a few movies!
I personally have never been into paying a professional technician to calibrate my TV. I've always been satisfied with calibrating myself using a home user Calibration disc such as AVia or DVE. However, the professional technician will have access to a whole slew of menus that you could seriously mess some stuff up in if you didn't know what you were doing.
