I was an early adopter of the PowerTank about 20 years ago. And they are pretty sweet for high volume air. But I learned about 19 years 11 months 3 weeks and 6 days ago that they are a giant PITA to fill, especially if you live outside of SLC.
I went through several 12 volt compressors over the years, settled on a viair 400p for quite a while. It was always super reliable, and always super slow. so slow.....
Then I went on a search for something better, I tried several more, an ARB single, the big smittybilt, and finally found the Outback air extreme magnum. It's made in the USA, Pumps out more air more reliably than any other sub $1000 compressor, factory installed in Earth roamers, sportsmobiles, earth cruisers, etc.
However, they are not a bolt in and go product. You've got to piece together the parts you want, figure the mounting location, wire and plumb.
If you're looking for something were all the work is done for you and you just need to bolt things together, then the ARB twin is a decent option that a lot of people have good luck with.