AJ,

First I have to said that I am not a professional, so I don't need (at this time) to go out with my matérial. It is now to play at house.
I am interested in the software solution because I think that this is the best solution for future, but I am not ready to go all software now because it seems to be a jungle for me.
What I look for is to enter in the software based sound with little risk. So I want to add a controller keyboard and software synth next to my pa80 and then to learn to use it. Maybe if your are familiar with softsynths then you can go to softarranger but both at the same time is to much for my brain.
I want to be first convinced by the sound.
I look for general sounds (organs, strings, synths, guitars, pianos) as a second instrument. You know that the ergonomy is not on the top on the pa80.
I want good preset sounds. Sure I will tweak them but to begin I want something that is playable on start.
Another question: Kontakt2 costs +/- 500 euros here (630 dollars).
What is the life time of that kind of program? Can you expect to use it 3, 4 or 5 years without a major improvement needed?
Thank you