Always interesting to look at Skytax
www.airlinequality.com. Treat with caution as those who post may not be representative of all travellers but useful all the same. You can also try Flyertalk but more "geeky".
I've always flown One World to HKG. However, work colleagues I spoke to weren't too impressed with Virgin. I flew with Swiss and Lufthansa to Tokyo a few years ago. Swiss was good and ZRH an excellent transfer airport. LH's IFE was a bit basic but otherwise OK. Munich also a good place to change planes, Frankfurt a bit hit or miss - you would be better to try the former. Please note that all of this was in economy.
If you are happy to fly from Heathrow check out All Nippon Airways - I've not flown them myself I've heard good things about them.