Best Orchestral Samples for *Live* Use? (Also, issues with Glissandi.)

I'm going to be running a 32-note midi pedalboard, an 88-key digital piano, and one of these:

Haken Audio - Continuum Overview


What orchestral sounds would be best for live use in such a situation? Obviously I can't manually tweak articulations and so on after the fact, but I'd like as much real-time functionality as is possible.
Obviously I won't get totally 'authentic' orchestral textures but that's ok. However I wouldn't mind being able to get something half-accurate when doing score-reading on this instrument.

The other big issue is glissandi and pitch-bends−I'm not familiar at all with how the programming works on the various orchestral libraries, so I'm not sure if they will choke when I start pitch bending all over the place on the continuum with string sounds, for isntance−ideas?

I'll have it set up with a computer keyboard within reach, so in addition to mappping samples onto different key-regions/dynamic-regions/timbre-zones (for the continuum) I can hit single-stroke qwerty keys for patch changes.