Thai is alright - I used them home from BKK to CPH this time but I was in business (or what they now call Premium economy on that route).
Check out these links for more info:
http://www.airlinesreviewed.com/revi...=&forumid=1015
http://www.seatguru.com/
http://www.airlinequality.com/Product/seat_intro.htm
I prefer SAS over Thai when going to Asia. Been to Kuala Lumpur and Singapore some times and SAS have good planes. Airbusses with good room and individual TV screens for each seat.
As Ratpack wrote do remember to sign up for their frequent flyer programme. The STAR alliance program is quite good and it does bring some really nice benefits with it.