EXS 24 Logic Sampler Users Group

I'm wondering if an Imac running Logic Express 7 and EXSP24 might be 
a viable alternative 2nd computer to complement a Logic Pro system 
that is getting taxed due to heavy sample library usage? I know 
nothing about the EXSP24 other than it is a playback-only engine. 
Would a system such as that have any other issues that would limit 
its usefulness? I realize it would top out at 2 GB of RAM and need an 
external audio interface, but other than that it could be a 
relatively inexpensive way to add more instruments while staying in 
the Mac domain. Any opinions appreciated.

Sean McCoy
Oregon Sound Recording