Color space

[David Oswald]

Pentax's manual for the *ist-DS is a little vague on the issue of 
colorspace selection.  My impression is that AdobeRGB colorspace is 
broader than sRGB, and that if I'm going to be working on my shots in 
Photoshop, I should probably switch to AdobeRGB.  But I'm not really 
clear on what's at work here.  Could someone explain this a little, or 
provide a reference?

Thanks!