Electronic cigarette users?

I have an electronic cigarette that I bought online from vaporkings.com, I got the joytech ego. I can use it here and there but I really wanted it to replace regular cigarettes for me because my fiance is allergic to the smoke. The thing is, it feels like my throat is being torn in half when I use my ego, and I hate that I have to push a button while I drag. It seems unnatural. Can anyone recommend an electronic cig I can buy online that won't hurt my throat and that doesn't have the button? Thanks :)