I'm a fan of redundant systems, and even more so I like the ARB compressors for exactly that, running the ARB's. They will never match the Yorks, Powerplant, Viairs, etc for performance, but thats not what they are designed for either. I think the best solution, is to get both, get the ARB compressor, mount it out of the way and "set it and forget it". I've set up other units to work with the air lockers, but by the time you by all the neccissary parts and your time, you could easily by the ARB compressor (especially now that the compact unit is $160). Then buy the York, Powerplant, etc... redundancy.
Remember, the ARB Compressor kits include the wiring, pre-terminated for the solenoids and the pressure switch, so you'll need to make your own wiring harness, and pressure switch, compressor switch, manifold, fittings, etc...