El Dusty
Member
i have the same, and I cant recommend them enough. they are amazing compressors.
they do not plug in to the dash though, as you said, they clamp straight to the battery.
the small one,
https://www.amazon.com/Smittybilt-2780-2-54-Universal-Compressor/dp/B004K296N6
and the big one,
https://www.amazon.com/Smittybilt-2781-5-65-Universal-Compressor/dp/B004K25GMG
for stock sized tires, and the other things you mentioned, the small one would be plenty. for oversized tires, I would go for the larger one. mostly, just to cut down the time it takes, but either one would work just fine.
Another vote here for the bigger of the smittybilt. Runs like a charm and easy to use.