Things that matter most to me:
- Velocity-dependent articulations. I don't want velocity to affect only volume or other trivial parameter of sound - I want several samples per instrument so piano/guitar/etc actually sound different when touched and when punched, just like it is in reality.
- Several samples per instrument with round-robin rotation so they don't sound like machine gun when triggered repeatedly.
- Intelligent models of real instruments, so fingers can be heard when sliding on the string, etc.
- VST, AU, LADSPA, DSSI, or XRNI plugin.
- Stability, decent support, etc.
I tried the free Native Instruments Komplete Players but they don't seem to have the two features I mentioned above. Maybe only free version is crippled and the expensive one does have velocity-articulations and round-robin?
What about EastWest/Quantum Leap Goliath?
Something else?
Maybe even free?