I understand why you want to go ele. vs air and the ele. will do a good job for the most part.BUT, you need to get a high quality model as the "usuall" $49.95 job's will not take the abuse of long term use. I prefer one that use's PSA paper than the Velcro as that velcro paper will cost you a small fortune compaired to a box load of PSA.
One other thing nice about the air DA is that you can change to different type pads with the twist of a wrench.5",6",PSA,Velcro,ect. Most ele. one's are a real pain to switch IF it's even possiable with the one you get.