XLR connectors

DH Labs has some nice ones that aren't super expensive. 

Neutrik is my go-to, and they have silver pins in some models, perfect for 100% silver conductor cables.

If your equipment supports the Balanced AES standard, then neither cables or XLR connectors are going to be contributing anything significant sonically.
Provide good clean/tight connections and you should be good to go.
B

I agree with erik & bob! Also, unless you plan on replacing the chassis connectors on your electronics, it would seem pointless to plug a $100 xlr cable connector into the $4 Neutrik on your device.

I’ve used Neutrik, Oyaide, EIZZ, and Bocchino XLRs. EIZZ and Bocchino sound best, probably due to their solderless compression fittings.

BTW, my Atmasphere MP-1 preamp supports the Balanced AES standard, and better XLRs do make an improvement.