I'd advise to avoid Thai Airways, the government own it, and unlike most government owned airlines, they have no idea how to properly run an airline. If you can, I'd suggest going with either Singapore, Malaysia, or Cathay Pacific. Not direct flights, however they are excellent airlines. If you prefer to save money and fly in premium economy vs business, Air France from Paris, British through London, and once again, Cathay through Hong Kong, are good choices. Turkish, Emirates, or Etihad may also be goo choices, because they give a good balance of time on the plane per flight if you don't like sitting on the plane for a long time (this should be moot if you're flying in business class, the seats are most excellent on flights of that range)
Of course these are my choices as an airline connoisseur, as someone who doesn't care much about these things. If you need help with flights, I know some tricks and such, and can help out.
Best wishes on SRS
