Could anyone tell me what the Y/C Correction and Gamma Adjustment features are on the Toshiba SD900E / SD9200 DVD Players. Should they be used? Are they a benefit on some transfers? What do they do? Also, given the choice of RGB Scart and S-Video connection on the SD900 / SD9200 Players. Which one is the better for a clearer, sharper, more lifelike (filmlike) image? Thank you, Martin.