Best for what? I'd say the "best" is the Esslinger aluminum ARCA head...don't plan on it being a "bolt on" though...and it's like 3500 bux...
the best for the money is a stock head that is ported and polished. is direct bolt on so it is wasy and way cheaper than the esslinger head.
How about the D-chambered oval port heads? I hear you can use them in place of a D-port turbo head, but how do they compare?