EXS 24 Logic Sampler Users Group

I'm sure that this has been covered 100fold by now, but unfortunately I have missed 
it.

Can anyone direct me to threads or help me answer the question of should I replace 
my Emu E4xtUltra with the EXS?

My needs are:
Good warm sounding rich strings, drums, ambience, piano, bass, synths for my home 
studio.

Extremely low latency and warmth/quality of sounds along with convenience is more 
important to me than quantity of sounds available.

I'm happy with the way the evp88 and evb3 sound with my audiophile 24/96 card, so 
I guess that the EXS would sound fairly good as well.  

Also, would an 800mhz G4 with 1 gig ram and multiple 7200 drives be enough to run 
an instance of evp88, evb3, clav, and 5-10 esx tracks?  or should i purchase a dual 1 
gig G4?  Do I need to upgrade my soundcard to get lower latency to run this many 
soft synths?

Any thoughts, suggesions, or links would be greatly appreciated.

Thanks,

Will