Gears

IMHO do the 3.23s. That way you can drive it anywhere you please. With that much horsepower and torque you sure don't need anything lower (numerically higher) to plant you in the seat. Since you aren't racing it seriously why beat on your combo more than you need to have fun. I've used 3.91s, 3.73s and 3.55s, but always keep coming back to 3.23s for a street car.