Ive the same tv as you and sky HD the settings are your own personal choice really as everybodys eyes see different.
One thing most people swear by is turn all your tvs noise reductions and filtering off as this can cause interference. picture to standard.
Must say its a great tv and im equally impressed with sky HD fitted 2 wks ago could do with more hd channels though 2 more coming b4 xmas though.
sometimes i do my settings on a news broadcast for the skin tones are natural. Enjoy that sonyDAZ