Processing a Video Wall of 143 videos

Hi,

I just constructed a 3D 'curved' video wall in After Effects utilizing Trapcode's Echospace, Slider expressions to controller the spacing between the 'screens,' and a camera mimicking a wide angle lens (zoomed out and moved in). I'm working in Full HD (1920x1080) on a Top of the line Mac Pro - 2 quad core Xeon processors with 16 gb of ram.

Though I'm only using solids as a placeholder, have the workspace resolution down to 1/4 and each individual layer set to draft quality, the computer is running into some processing issues while trying to create a ram preview and may even lock up (even with multi-core processing on). I'm testing with a 10s animation with camera movement and both motion blur on and off. However, I tested a render and, though expectedly slow (20mins with Motion blur on and 1 min with it off), it seems to render out ok.

Now if it's sucking back this much processing now, I can just imagine the troubles I going to run into when I attach a video file to my wall?

Do you have any recommendations on processor saving techniques and work flow which could save this project for me? Other than the obvious-hiding layers,using less videos, or proxies.

This is a doosy, but if I can pull this project together it'll prove to be quite the show piece for me and After Effects gurus alike.