I attached here the settings that currently im using in my C6500. So far, this settings seems good. Appreciate if other forumers can give some comments regarding this settings, so we can get the best out from it.
Full credit to Mantisboxer from AVS forum.

Basic Parameters:
Cell Light = 14
Contrast = 85
Brightness = 57
Color = 49
Tint = G50/R50
Gamma = +1

White Balance:
R Gain = 25
G Gain = 25
B Gain = 38
R Offset = 25
G Offset = 25
B Offset = 26

10 Point White Balance:
Interval: R G B
1: 4 0 -1
2: 1 0 -1
3: 1 0 0
4: 0 0 -1
5: 0 0 -1
6: 2 0 -1
7: 0 0 1
8: 2 0 3
9: 0 0 0
10: 6 0 7

Custom Color Space:
R 50 0 6
G 19 29 5
B 0 0 76
Y 57 39 14
C 35 19 50
M 37 0 58