If I had to get electric, I'd get a smooth top for the looks and cleanliness issue. They're slower than a coil to change temperature though, and remain dangerously hot for a long while after use. Most have a warning light to tell you that the surface may be hot.
Those iron disc elements are horrible, IMO. My mom thought she got a bargain on one of those, barely used, but it really sucks (takes for-fckking-ever to change temperature), and she laments having wasted her money (my mom and step-dad have a history of wasting money trying to be stingy). She's going back to gas, even though all she has is propane.