Do get one that is quilted with blocks or has channels. These keep the down from shifting and ending all down by your feet in the morning.
Also, get one that has a higher percentage of down than feathers. The cheaper ones have feathers, but feathers have those pokey, scratchy quills down the center of the feathers, which make for hard, crunchy, pokey, scratchy comforters. Ouch!

Down is the soft, white fluff, like the dandelion puffs.
Make sure you get a down comforter COVER to go over the comforter. Not to be confused with a regular comforter cover or duvet. This cover is specifically to contain & protect the down. If GF turns out to be allergic to down, it helps keep the down contained.
There is also a material called "down alternative" which is strands & puffs of polyester, made to mimic the fluff of down. I now have pillows made of this as I developed an allergy to down. I love the "down alternative". It feels like the real thing.

They are also easier to launder.
Down comforters & "down alternative" are at "Bed, Bath & Beyond" stores. You may be able to find a coupon out, to bring the price down.
