EXS 24 Logic Sampler Users Group

I have an idea and I don't know if it's good or bad, but maybe you 
guys can shed some light. It's a little more off topic than I would 
normally post here, but I am apologizing in advance.

I own a MOTU Firewire 828 and I'm considering a MOTU 24i PCI which 
would give me 32 analog inputs.  Can I just plug my outboard gear 
directly into these two modules, assign the various inputs to 
channels on the Logic mixer, and take advantage of Logic's real time 
effects?  I can assign all the inputs to output L&R Monitor on the 
Firewire 828.  My biggest concern is how much strain this puts on the 
CPU.  For reverb and delay I assume it's wise to use AUX SENDS. But 
using compressors on inserts would be sweet.  But if I press a note 
on my synth and it has to go through the MOTU -> COMPUTER -> BACK OUT 
THE MOTU, will there be major latency?  I have a Powermac G4/450 with 
1GB ram.

Thanks for listening..

Regards,
Mark