To echo Dave Kavensky's post, to me the biggest problem with getting into electrics is choosing the gear. The answer to "what do I replace my ST .46 with" doesn't seem to exist. Instead you get a tutorial on battery C-ratings, watts-per-rpm, and a bunch of formulas. After a fair amount of research you can probably make an educated guess about what you need for a specific plane, but you can only test your answer by purchasing the gear and trying it out. In fact, most electric guys I know are always experimenting, and the cost doesn't seem to be a big factor to them.