Sample Formats, What runs with Unity sampler? Options

[toekneenose]

I'm running Logic Platinum and Unity sampler on a dual 800 G4 w/1.5 Gig RAM, a Tascam US-122 interface. I intend to do mostly MIDI sample tracks to build orchestral music.

I just got the Garritan samples with the Kompakt interface. It all works beautifully!

My question:
As I understand it, this version of Kompakt (the one that came with the Garritan samples) cannot be used for other samples, that it is dedicated only to the Garratan package. Is this correct? Or can I use it with other samples (Gigasample, for example) packages designed for Kompakt?

Also:
I want to get the very best choir samples as well. Can you recommend a choir sample package that will integrate and fully operate well with Unity? The Unity manual says it will play Gigasample samples, but I want to be certain before I invest $4-500 in something like Voices of the Apocalypse.

Any adivce? Suggestions?