I am not sure from your post if you have suffered problems with data in daylite like you have with Now Contact. Openbase, our database engine is very stable and very powerful, data stored in Openbase is very secure, you can even have Openbase make daily backups, if you concerned about data stability.
Daylite is a powerful tool, version 3 has drastically improved the usability of the program. We have received very good feedback from customers and independent reviewers, most recently http://www.mymac.com/showarticle.php?id=2688
Please contact us if you would like to talk about Daylite further.
(Version 3.1.3)