Down comforters? I would like to buy a down comforter. What sort of things...

I would like to buy a down comforter. What sort of things should I look for? Thread count, etc?
What do ya ponder of this??
Answers:    the highly developed the thread count the better (400+)

baffles - carry one that looks like the down is stitched into little boxes instead of on that looks approaching a bag full up with feathers. the 'boxes' stops adjectives the down from shifting around to one side.

machine washable - dry cleaning costs a fortune
What colour trimmings next to black and cream...
Quilted, otherwise adjectives th feathers will lump up on one side and you'll have to shake it adjectives the time.