trying to set tv up using both digital video essentials dvd and thx dvd but struggling with contrast and sharpness settings.have always been told that contrast on standard setup is far to bright but even with contrast on max setting can clearly see seperate white boxes on setup dvds.on sharpness setup setting is nearly set to minimum when i think its correct on setup dvd is this normal ? also other settings on tv that unsure of are backlight settings ,noise reduction and all enhancment type settings.tv is sony 40x3000. thanks