I agree - go SK. Yes, SQ is great, but if you want a different experience and you are already flying CPH-SIN on SQ, then SK definately is the way to go. Forget LH (unless you fly out of ICN or wherever the 346 is being deployed, the new LH C class may or may not be better than SK). TG would be the last choice based on their current equipment for long haul C class.