Hypertherm, HTP, or Thermal Dynamics. The 45XP is more like $2100 brand new. An HTP Microcut 875sc is about $1700. A smaller unit like a 40A Thermal Dynamics is about $1400. HTP has a similar 40A unit for $1100.
The big difference between the cheaper ones like the Eastwood is the consumable life. I used to have an Eastwood 40A and the consumable like was pretty horrible. They use out-dated torch designs/power supplies, which is why they're so cheap.
One thing to keep in mind is consumables. You WILL be changing them out frequently. Price out: cutting tips (nozzles), electrodes, Swirl rings, shield cup body, drag cups. So you can see how much it will cost each time you replace the electrode and cutting tip. Air-water separators don't do much for plasma cutters, in terms of helping. They're better than not having anything, but there will always be some moisture in the air stream, which robs cutting power and consumable life. The only thing that has really helped me is an air drying setup to the tune of $300, specialized for plasma cutting. Clean very dry air REALLY helps maximizing consumable life, and cutting power. Dross is also minimized.