In a XXX-CR, I'd run a Savox SC-1257TG. The little buggy won't need the 166 oz-in of torque that the 1258 puts out, the 57 is a smidge faster, and doesn't tax the BEC quite as bad. The 1258 can be quite a beast to power without getting brownouts on your receiver unless your ESC has a solid BEC.
SC-1257TG is 139 oz-in at .07 transit.
I've also had good luck with used Airtronics 94357's. They are analog but work well and are 125 oz-in at .07 @ 6v.