I wouldn't look at 12v for doing wheels or anything like that, especially in the rust belt. They just don't have the beans for the job. The torque ratings aren't really accurate that they advertise, and you need a surprising amount of breakaway torque for anything corroded.
I have DeWalt high-torque and mid-torque in 20v, and Milwaukee M12 stubby impact, and with the rusty cars here the M12 isn't good for anything beyond very small fasteners. My mid torque DeWalt is the "older" but brushless DCF894, and even that is hit or miss on lug nuts depending on the car. My truck's lugs that are torqued at 140 ft-lbs it struggles with.
The first one I grab is the high-torque DCF899. It's big and heavy, but at least it has the power to zip any lug nut off, and most suspension bolts (although it's still not quite as powerful as my air gun). Unless you have to use it all day long, the size/weight isn't a big turn off for me. I'd rather have the power so I can use it versus a lightweight tool that doesn't do the job. Of course you're also trading off clearance with the big boy, and it costs more.
The newer Atomic compacts listed above supposedly have more power than the old mid-torques, but I haven't tried one personally to comment.
