From where I stand, you are considering maximum depth, knowledge/skill development, and AOW qualifications dives.
- Maximum Depth: I would not use the maximum possible depth as the deciding factor because you/she might not be able to reach said depth becasue of the dive site's charactersitics. While the instructor will probably try take you guys to a deeper depth, the conditions, site and other factors will influence wheter or not you go much beyond 60'.
- Knowweldge/skill developmetn: Personally, it's always beneficial to gain more skills and knowldge for diving. In particular, the naviation dive will be useful for improving your skills when diving without a guide. Additionally, I believe that everyone would benefit from taking a peak performance buoyance course, both to make diving easier and to help improve air consumption.
- AOW qualification dives: You have three choices for the additional dives outside of deep and navigatoin. Shops and instructors will differ on which choices dives they offer. I would make a list of dives that you want to do and see if those dives are avaliable at a given shop.