Adding lunchbox...concerns for input/outputs and which lunchbox to choose

I've decided to add a lunchbox to my system. Just won an auction for an elysia xpressor so that will be my starting module. I need to decide on a chassis now.



I was originally eyeing the Lindell Audio 506, however; I realized I would need to add something like a behringer ADA8000 to have enough inputs. So I started wondering if maybe a lunchbox exists that has ADAT/Lightpipe and allows for easy connection to an interface. Surprisingly, nada.



I've got a saffire pro 40. Already using 5 inputs with my king korg, jv 1080, and se-1x. So that leaves me only 3 inputs for my lunchbox which isn't enough for a 6 slot chassis. (I've got enough available outputs)



So, basically, I need 3 extra inputs. Is my only/best option an ADA8000 via lightpipe ? Will the modules encounter any latency issues if, for instance, the xpressors outputs are plugged into the ADA8000 inputs and the xpressors inputs are plugged into the saffire pro 40 outputs? (Basically, could the xpressor have it's inputs and outputs connected to the two different interfaces?)



Wish there was an easier way to add a few inputs?



How would you guys go about managing this input/output scenario?



Thanks :)

Adding lunchbox...concerns for input/outputs and which lunchbox to choose