The bad ass Genelec's will go down to 19hz, the 1032As and the 824s do about 39Hz. Turbosound rigs go down to between 35 and 50 hz or there abouts.

Here's what I reckon on the bass debate ... sometimes it's very useful to find the fundamental of the lowest bass note you are using (use a sine wave on a nice synth like an access virus to do this), play the low note on your sine wave, find the frequency by moving a hi pass filter up till you hear it start to get quieter then move it back down a couple of Hz. Use this filter on the bass sound for maximum clarity.

Try Ze MigL's 10db low shelf cut on the kick drum.