I keep forgetting to mention my HF compressed air dryer that I purchased about 6 years ago. They are around 1/3 the cost of a comparable IR dryer (same CFM, same pressure, same moisture extraction rate). I see they are still about 300 bucks but I belive they can only be purchased online as I've never seen one in the local HF emporium that I can recollect.
Not as aesthetically pleasing as the IR unit, but it's a tool, not a female....lol
Only thing I've had to do to mine was replace the start capacitor on the compressor, mine took a dump about a year into operation. Digikey had the right one, no big deal. It's R134 so recharging isn't an issue (if it ever needs recharged). Extracts 99% of the condensation and has an automatic drain valve too.
For 300 bucks, versus around 900 for the IR, it's a bargain.