I am in the middle of getting my AONE4 organised and did it through a TA online. Went through this TA for an upcoming trip to BKK and Hanoi, did a good job for me there so shopped around first then went back. He booked all my flights first. Least got the ole saying of Bum on seat before the arguements start with QF. They say that LHR-VIE-LHR-DXB-LHR is two continents. Got my TA arguing the fact and if need be go to BA. Good luck with your planning, my TA gave the right advice at the right time, and FT forum with lots of reading gave the rest.