Harmony Navigator and Finale Songwriter

Hi! I would just like to ask any feed backs, reviews, comments etc about harmony navigator 2.0 and finale songwriter.
The only reason why I am contemplating of getting the Harmony Navigator 2.0 is to help me with my chord progression (especially finding the best chord to a melody) as I don't have any formal music education and the reason why I am planning to get the finale songwriter only is because I need a decent notation software that can transcribed my song and put all the necessary things on it (including the notes and the guitar chords).
With this into mind, do you think these softwares can help me? Any suggestions just in case. By the way, I am not interested in purchasing the finale 2014 as I think most of its features I am not going to use anyway and the synfire pro for the same reasons. Perhaps If I am going into chamber or orchestral music already, I might but for the mean time, I need only something that can help me with the chords (or can advice me what is the best chords to choose) and something that can write it professionally for me.
 
Big thanks!