Is bi amping worth it ?

@yoyoyaya 

yes these speakers are set up for easy bi amping . 
 

better quality power. ?  I know there is better of course but I would have thought the McIntosh 601 monoblocks and McIntosh tube pre amp would be of sufficient quality power 

@OP. Your preamp has multiple pre outs, so you can easily bi-amp without an additional crossover.

The pre and power are perfectly fine, though a high quality solid state class amp of lower power would be a better match for the speakers. I say solid state because the speakers have a very demanding modulus of impedance in the bass.

However, from your description of what you are trying to achieve sonically, the problem is that the speaker is quite uneven in the mid to upper bass and has a very rapid falloff lower down. Bi-amping is not really going to help you because it's not going to correct or even ameliorate the fundamental issues in the bass referred to above. 

It depends on the quality/design of your crossover.

There is no objective difference using 2 amps instead of one. There are no speakers that can differentiate where electrons come from. 

@roadcykler Wrote:

There is no objective difference using 2 amps instead of one. There are no speakers that can differentiate where electrons come from. 

See here last page BI-AMPLIFICATION. 😎

Mike