About the only info I have found sofar is the beginning of the video on youtube in TR BOM - LHR On 9W's Brand New 773-ER (by Justbala Aug 1 2007 in Trip Reports)
Finally got the seatmap working from http://www.jetairways.com/Cultures/e...ingdom/About+Us/Fleet+Information/
The seating on the B773 is 8/30/274 with 1-2-1 seating in Business.
Telling from the seatmap, I probably would want to avoid the bulkhead seats.
With every seat an aisle-seat, there is not too much to choose.
If you like to look out of the window, get a seat facing away from the sun. That would be "A" for the trip in question, although F/A's might ask you to shut the shades anyhow (at least from EWR
If you want to sleep, go for the central seats; noise from air flowing along the fuselage is less over there.
Carpe diem ! Life is too short to waste your time ! Keep in mind, that today is the first day of the rest of your life !