RE: fastest electric model ?
My first plane was (and it is still flying) a GWS E-Starter, a high-wing electric "trainer" with ailerons, built light. The light weight allows it to fly slowly but also makes it pretty sensitive to wind. Still, during the first few flights everything seemed to happen frighteningly fast.
My next step was a GWS Formosa, a low wing aerobatic plane not built for speed. I put a more powerful motor in it and the bigger battery made it heavier too. The first few flights (and crashes) seemed fast enough, again.
... Another vote for starting easy and working your way up to whatever you want to reach ...