Alternative company:

Previous post - Funny door lock - works if one isn't red/green color blind.

Other issue with the locks would be power failure at the home. For commercial use, there might be a battery backup, but if the power goes out for a prolonged period of time, you might have use the master crowbar lock bypass system for residential use.

I am thinking of getting a safe with biometrics.

wow it's very expensive for a lock door did you see this website?

http://www.serrures-biometriques.com/ 

All the systems mentioned are available in many different forms and levels, from gimmick type of residential focused locks/readers to high end commercial (professional) products.

 Some things to consider other that price!

Does your insurance company require/specify deadlocks on doors? Most will not satisfy this without an elaborate expensive setup.

If choosing a code pad, if entering the secured area with another person, a code is easy to see and remember by others. Could be your kids friend. Do you want this. In a commercial application that is able to be audited a code is useless as there is no way of knowing if the code that was allocated to and individual was actually used by this individual.

Just a few things to consider, hope this helps.