Hi David, welcome to the forum!
You'll find the service manual is a handy thing to have. You can find a free .pdf download at Buellmods.com or Buelltooth.com. It will have a Vin decoder in the front that will define whether it's a City X or not.
EBC HH pads are pretty much agreed as the best all around brake pad for these. I'd PM Lunatic for them. He is super knowledgeable and has brake pads (and rotors) as well as many other service parts. You won't find a better source
Be aware that dirty brake hardware and improperly bedded brake pads can easily fake you out and act like a warped rotor which is really rare on these.
Enjoy the new bike! They are full of character, just like the guys on here