If you just want to go fast get a Viper or Predator and do the very minor upgrades. You will need new underwear!
The Magnum is a super cool model IMO just not worth spending that much when, as stated before, you can go a lot faster easier and cheaper with the quickies. One of my fav things about the Magnum is the cool whistle noise it makes. If I could get my quickies to make that noise I would be tickled.