Like back-to-back? Not sure there would be a huge benefit unless you had a lot of water/oil coming out of the compressor, it's basically just like adding two filters. The problem is you need to cool the air down to change the dew point and get the water vapor out of the air. A separator just...
Not sure what the savings are if you go away from the silent option on the Eaton, but I do recommend it highly. I have the 3-cylinder 7.5hp version I've used for 6 or 7 years now, and besides being well built the feature that I haven't seen on competing products was the whip valve (continuous...
I went fancy when installed my compressor and used a braided stainless flex hose, but it was a pretty fancy compressor so I figured it was warranted.
McMaster-Carr
But they have lots of other options if you think that's overkill.