well if you are in a shop environment and always have air available then no question i would go air. its going to be 1/4 the size, way lighter and easier to get into tight areas. if your out on the road where you might not have air available then elec will be a must unless you go with that cordless that aae posted. that looks like a nice piece. only drawback is you need to keep up on charging batteries. really depends on how much you use it and for how long.