Yes, some FX and a modulation source would definitely improve the setup. I'm not really enjoying the factory delay in the Neutron and i find myself in situations where i could use another LFO.
For a stereo line-level output would something like Intellijel Outs do the job? Here's what i came up with for starters, removed some modules because of budget limitations.
As for the casing, I'm looking at Tip Top Mantis.

ModularGrid Rack