I've been using a 12v Intercompressor for decades. If it conks out, I'd be looking at something like the Viair.
But, dragging the cord out, and crawling into the car has gotten old, especially since I rarely have to do more than check pressures and top off by a couple pounds.
Since I've become invested in the Ridgid tool system, I'm looking to pick up their cordless inflator, which can also run off a cord as well.
One thing to be aware of, for any portable, is their duty cycle. Even the US-made IC noted above, of generally good quality, has seen its 12v plug deform from heating up from being used for long durations.
The plug's length is also too shallow for some 12v outlets, so I have a battery terminal-to-12v adapter cord for it, which also removes risk from overheating an outlet in the car.