Currently Discover card is offering 20% discount for Crutchfield Gift Cards.
If you have high value, rarely discounted audio/video gear that you would like to purchase now or in future, might be a good time to convert discover cashback to crutchfield cards.
Normally retailers cards rarely go at > 10% discount. Good deal IMO.
They sell TV's, Cameras, Camcorders (Pro/Consumer level), Car audio etc.
On discover.com, look under cashback rewards->gift cards
Rep if you like this deal/use this deal.