The cheapest of all:
Learn how to use that auto-stick. It won't let you go over the red line. It may sound like it's going to explode, but if you hit the red line, it'll just upshift for you.

I usually just step on it in first, it'll red line pretty quick into second, then I'll slap it into third around 5 grand. When it's time for fourth, I just put her back into drive and let the car do the rest.
*And turn that traction control off.

Matt