Well, I'm also 6'4" and have no problem with ANY Upper Deck seat. OK you may need to bend you knees slightly when sleeping, but I do that at home anyway (I also sleep naked at home, but wouldn't try that on a flight!)

I was in 64J last night and still managed to be the first one to disembark, albeit from door 2L. While 64J isn't my first choice of seat (unless travelling with Mrs PtF in 64K) the booking itself was made at very short notice so I was glad to get anything upstairs.

However, having read this thread I'll give 14K the 'once over' for future reference.

Given that I was regularly travelling in World Traveller (amongst the unwashed) until six years ago I'm grateful that these days I fly seated ANYWHERE in Club World.