SB Live and Layla coexisting

[AlChuck]

Currently I have a lowly Pentium 200 MMX w/64 MB 66Mhz RAM with a Sound Blaster Live! card, and I'm getting ready to do an upgrade. Besides the host itself, I plan to keep the SB Live! as my MIDI synth and sampler (hooray for SoundFonts!), but use something like the Echo Layla or Mona for digital audio recording. As I thought about it, I realized that it's not clear to me how this will all work. If I'm monitoring through the outputs of the Layla, say, how do I hear the SB Live? Does such a setup require an outboard mixer to combine the outputs to a stereo pair for monitoring? Or do you take the output of the SB Live and run it through two of the channels of the Layla, back into the computer? This is starting to sound silly -- do I record the MIDI stuff to digital audio then? -Though of course I'd have to mix that stuff to audio anyway to create a stereo WAV for burning to CD, so maybe that's not silly after all...
Thanks!