I was thinking about getting the Chase Freedom Unlimited card as I found out you can get them in branches now. But, does it make more sense to sign up for this card directly with its measly sign-up bonus of $150/15,000 points or should I sign up for a card like Chase Sapphire Preferred and get a $500/50,000 point sign up bonus and then in a few months downgrade the card (assuming that's possible) so that there's no annual fee? Do any more experienced DDfers have any quick advice?