I would probably recommend DMM-Tech servos over some no-name aliexpress vendor.  The specs look very similar, but DMM ships from Canada and will honor warentees.  They are also cheaper, and will help you over the phone/email if you need support.

 

I use DMM tech on one of my machines and have been happy with the performance and support.  A few builds on cnczone use them as well.

 

Ryan