Yesterday I bought an air compressor at Home Depot for $79.00
It has the two gallon tanks. It takes about 20 minutes for it to reach 90 pounds and was ok filling the tires on my suv. I also looked at other compressors at Lowes and Sears, but they cost more. I have not tried it on my motor home where I will need it to air up my tires to 75 and 80 pounds. It runs on 110, which I can run on my generator. I would not suggest going with a dc compressor, for the reasons stated above. I am going on vacation next week and I will be taking it with me. With an extension cord, it will be able to reach any tire. That, and the Stop & Go tire puncture repair kit and I will be all set to go.