Having investigated further, here are settings from GT50 full calibration reports for Professional and Normal modes:
Professional 1
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Contrast 39; Brightness 31; Colour 27; Sharpness 0 (I've set this at 1); Gamma 2.2
White Balance
R Gain -3
G Gain -1
B Gain +2
R Cut 0
G Cut -2
B Cut -1
Colour Management
R Hue -9
G Hue -5
B Hue 0
R Sat -2
G Sat -4
B Sat 0
R Lum +3
G Lum +1
B Lum +2
More Detailed Adjustments
Y Hue 0
C Hue +3
M Hue -1
Y Sat 0
C Sat 0
M Sat -3
Y Lum +1
C Lum -3
M Lum +7
Normal [/b]
Contrast 28; Brightness 30; Colour 27; Sharpness 0; Gamma 2.2
White Balance
R Gain -8
G Gain -5
B Gain 5
R Cut 6
G Cut -7
B Cut 0
I'm unlikely to keep the TV, but for now these both look better to my eyes that the Flat Panels HD Professional 1 settings linked to a while back.
Professional 1
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Contrast 39; Brightness 31; Colour 27; Sharpness 0 (I've set this at 1); Gamma 2.2
White Balance
R Gain -3
G Gain -1
B Gain +2
R Cut 0
G Cut -2
B Cut -1
Colour Management
R Hue -9
G Hue -5
B Hue 0
R Sat -2
G Sat -4
B Sat 0
R Lum +3
G Lum +1
B Lum +2
More Detailed Adjustments
Y Hue 0
C Hue +3
M Hue -1
Y Sat 0
C Sat 0
M Sat -3
Y Lum +1
C Lum -3
M Lum +7
Normal [/b]
Contrast 28; Brightness 30; Colour 27; Sharpness 0; Gamma 2.2
White Balance
R Gain -8
G Gain -5
B Gain 5
R Cut 6
G Cut -7
B Cut 0
I'm unlikely to keep the TV, but for now these both look better to my eyes that the Flat Panels HD Professional 1 settings linked to a while back.