Hey EGNH,
Just returned from Dubai on KLM 777-200 and travelled to JFK with them. Connection times in amsterdam are more than adequate thats if your Manchester flights on time.Ptv's are really good with KLM aswell not as good as Emirates but it does its job for a long haul flight check out seatguru before you fly but row 30 is cracking no windows but good bulkheads have a good time let us know how you get on.
Regards steve