David,
I'd have to agree with Bob on this one: stick with DLS 2002. DLS 5 will not provide you with additional features, just a different interface. I use both DLS 2002 and DLS 5 (since DLS 5 doesn't support older panels), and still prefer DLS 2002.
With DLS 2002, all the sections are laid out in the same way as they are in the panel programming, installation manual, etc. This makes everything very easy to find.
With DLS 5, all the sections are categorized into specific areas, rather than the order of the section number itself. Sometimes this is helpful, and sometimes it makes you search all over the place for a rarely used bit of programming.
Better yet, program it by hand at the keypad. It should take no more than five minutes.
- Chris