bump <--- lol my first bump ever!
Why would you want a less powerful configuration for exporting (I assume your use of rendering really means exporting)?
Maximus is old technology (2011-2012), I would guess your Titan X on your "composing" computer would easily outperform the Maximus.
Your choice of 8-core E5-2670 at 2.6 GHz while costing about $3000 (plus lots more for motherboard and memory) just for the two chips probably would not be much faster than a single $1000 slightly overclocked i7-5960X with 8 cores. I do not have any test data on the dual E5-2670, but we do have PPBM8 data on Eric Bowen's (ADK) dual -E5-2687, also 8 cores but at 3.1 GHz while your proposed E5-2670 only runs at 2.8 GHz
I already own the dual xeon configuration. I upgraded to the i7-5960x/DD4/titan-x setup. I wanted to put the dual xeon to use. I guess exporting from AE is what I was thinking because most of the time consuming process is rendering a finished file and this way not rely on the i7 for rendering.
sorry to bump. Actually getting the 2nd setup up and running today. Not sure if I can use for rendering only.