There's one that I don't think has been mentioned. Take a look at the NEMA roster.
http://www.nemaracing.com/roster.htm You'll see all the big name engines. Last Saturday night, one of the Autocraft-powered cars absolutely smoked them. You can see the story on
http://www.nemaracing.com
They cost a lot less than the big names. Anything with enough power to pull that huge roof around has enough power to put on a good show.
BTW, as mentioned above, the NEMA Lites put on a good show that night, too.