You are going to get lots of different answers but here is one option (the new actinium v4 motor is wicked fast). Team Powers MS-Radon and Actinium V4. Top-of-the-line electronics that fit within your budget.
https://www.amainhobbies.com/team-po...n100a/p1291879
https://www.teampowersusa.com/Team-P...ing_p_270.html