I wouldn't do that. While you definitely get two balanced outs from that Erica mixer, if you're sending to that interface directly, you're far better off going 1/4" TRS - XLR-M. That ensures that your signals stay in a balanced circuit from the modular to the 8pre, which should help with noise and maintaining the same level at the 8pre's inputs.
Good interface choice, also...it's a snap to go from 8 channels to 24 via the ADAT lightpipe connections. Just make sure your lightpipe-connected interfaces are ALSO DC-coupled.
-- Lugia
Thanks for the advice. The Motu choice was a happy accident, used them in the past, and recently bought the 8pre-es before looking at getting into modular, so lucked out with the whole DC thing :)
Cheers
TSG