The Cash+ is pretty sweet especially since they added utilities as a category. Since you have the Quicksilver, I'd consider PCing the Double Cash to a Dividend at some point, if the Dividend is appealing for you - reason being cuz there really aren't all that many 5% cards, and since you already have the Freedom, Discover It, and are looking at the Cash+, that pretty much leaves the Dividend, Amazon Prime Visa, Target Red card (which you can get as a debit version), a gas card (Ducks Unlimited or Ft Knox FCU Visa), the Chase Ink Cash, Nusenda CU Platinum Cash Rewards or Vantage West CU Connect Rewards. The Nusenda and Vantage West cards require you to be a member of those CUs which is a bit cumbersome if you don't live in their areas, but doable, and the Ink Cash requires you to own a business - again, a bit cumbersome, but doable for most people. The Amazon visa requires you to be a Prime member to get 5%, so if you already are a Prime member and shop there a lot that could be worthwhile.
TLDR:
5% cash back cards to consider (besides the Cash+):
PC your Double Cash to a Dividend
Chase Amazon Prime Visa (3% if you're not a Prime member)
Target Red card (available as a debit card)
Ducks Unlimited or Ft Knox Visa
Chase Ink Cash (requires a business)
Nusenda Platinum Cash Rewards (requires membership)
Vantage West Connect Rewards (requires membership)
if you PC your Double Cash and are remiss about getting 1.5% instead of 2%, consider the PayPal Cash Back MasterCard. With the PayPal Business Debit card (which you can get with a standard PayPal account), you can set up the Cash Back MC as the backup funding source - the Business Debit gets 1% CB on credit transactions, then you get the 2% from the CC and end up with 3% back on all credit transactions. You'd also get 2% back on transactions ran as debit as you still get the 2% cash back from the CC but not the 1% from the debit card in that case.
