The basic grey design is rather blase (blah-zay).
Will clicking on the:
I want to replace a Card that I currently carry.
(Choose this if your Card is worn or damaged or if you would like to replace your current Card design with a new design.)
actually cancel the current one or simply start the process?
It seems you can't look at the available designs without going past this point.
Then, I believe, there is the option of using your own photo. Which opens another realm.
A picture of carbon fiber perhaps?
I admit that could look very cool lol
oh well, "at this time" the personal upload option is not available according to the chat session.
none of the standard options move me, carbon fiber would have looked cool
You should look at the "Black Glow" design. It's the one I have. If you want to see it before you click the link:
Click on the credit cards tab on the bottom of the page
Click on Discover More
Click on "Choose from over 100 designs"
Click on the "Graphics" category
to your original question, if you ever decide to get another card design, you can have multiple cards,it doesnt change the number when you order a new one. I have several just because i like them lol and i dont even use the card anymore, but i keep a back up of all my cards because i tend to lose them around the house or in the car in between my seats and its always when i am about to use them for a big purchase.
(edited for clarification)
I use the black monogram design, very nice looking card in my opinion.