[H] audio/speakers questions..

[Veech Malone]

 I have a P4 setup with a P4C800E board along with an Audigy 2 ZS 
Platinum Pro soundcard.   I am currently using my Logitech Z680's for 
speakers, using the 6 channel analog audio outs from the CL card, 
plugged into the Logitech pod.  It gives serviceable 5.1 sound.

I want to modify my setup to accommodate a pair of audiophile stereo 
speakers (well, more like studio reference monitors) as well as the 5.1 
setup.   I doubt that this can this be done with my current config, but 
does anyone have a similar configuration?  I'm looking for an A/B 
option, where the A is audio output to the stereo studio reference 
monitors, the B is output to the Logitech pod for the 5.1 surround sound.

I'm not so concerned about the 5.1 surround sound quality, as what I 
have now is adequate.  However, I do want the best possible output 
quality for the refernce monitors.  I'm concerned that my current setup 
will not provide that, no matter how good the speakers are.  I'm 
prepared to upgrade the board and CPU, was planning on it anyway 
eventually.  Are the new digital-out motherboards worth looking at as an 
option?  AMD based is fine, in fact it's preferred..

thanks,

Veech