Keep that in mind. A professional calibration with a technician who digs into the non-user accessible service menus making gamma adjustments, etc. can run upwards of $350. Sometimes it can really make a big difference in what you see on your HDTV. Even for the non-videophile. YMMV.
I suggest looking/posting in the HDTV picture settings sub-forum for specifics as to how you might configure the video settings of your model HDTV before you consider paying more for pro calibration. Also look in the LG sub-forum @ AVS forum:
Could you calibrate the LG 47 LM6200 please...