I have a Roland JX-8, a DSI Mopho, and a few other little analog desktops I use a lot so I am a little spoiled. If you're looking for an ni synth that is insanely powerful when used the right way, and intuitive start to mess around with modular building in kontact or the expert editor in fm8. Fm8 is crazy when you use it the right way. I use the tal as well, i like the noise oscillator for mono bass stuff.
'bl00 has repeatedly recommended Kontact. I think it's harder to acquire or spoof a license than most other things. I'm pretty jealous of the analog gear. Someday, I'll get some nicer digs.
Kontact is amazing and powerful, I don't have the newest version though and I really want razor and the new updates. The thing about kontact is that it has a ton of synth engines in it, it isn't just one vst, it's more like 1,000 haha. You can also stack their instruments in their modular programming window, which is kind of amazing as far as variability and sound possibilities. I have some stuff in a folder on an xhd I can send you I think, pm me your email.