Thank you all for the help. I downloaded the demo of Kontkat and was not impressed. Interface wasn't as friendly as some of the others I have tried. Of course the problem could be me. You can teach an old dog new tricks but it can be tough. The question is now what? The logical thing to do is to buy "something" and get rid of my old keyboards (Ensoniq SD-1 and TS-10). Just need to figure out what that something is. Thanks again to all. As the saying goes, if it was easy anybody could do it.

Either Kontakt or SampleTank would be a good virtual instrument replacement for a keyboard workstation. Those are probably the best available.  Then there is always Steinberg HALion Sonic, but while that should work with any DAW, it is optimized for Cubase.  So that is about it for the general instrument samplers. 
 
Everything else is very specialized for orchestral libraries, or specific instruments, etc.  Big bucks involved in the specialty stuff, as that is the domain of professional film composers and such. The rest of the soft synths are aimed mostly at electronic music producers.  There are a few good commercial virtual analog synths, but they won't have the real instruments you are probably seeking for your musical styles.
 
If the soft synth interfaces aren't working for you, maybe a trip to the local music store might help.  Some folks still prefer hardware.