Bi-Amp Question

Hello to all, First off, I've perused the threads on bi-amping and gleaned what information I could. The concensus seems to be that the benefits derived from bi-amping are greatest when using an active crossover. I currently have a four-channel amplifier rated at 75Wx4. It is powering a front component set as well as my rear fill speakers. I've minimized the gain to the rear speakers as a result of excessive output, to the point where I'm sure deck power alone would be sufficient. Which leaves me with possibly two un-used amplifier channels... I'm considering the purchase of a set of Focal 165W 2-way components. I've listened to these in a local car audio shop and was very impressed with them. Here are there specs:       2-way separate system, possible bi-amplification. 165mm (6-1/2") midbass, 40mm (1-3/8") v.coil, 100mm (4") magnet. TN 51 tweeter. 2-way separate crossover with high end components. 24 dB/oct. (3kHz) with adjustable levels. Max. power handling: 200W. Nominal, power handling: 100W. Sensitivity (2.8 V/1m): 92.5dB. Frequency response: 50Hz-22kHz. I've thought about bi-amping the speakers using only the supplied passive crossover. For this particular scenario, will I derive enough benefits to justify bi-amping? I could conceivably sell my amplifier and purchase something such as the Jl 300/2, but I'd rather not. I'm just trying to find out if this would work without going with active crossovers. Thank you.             

Yes, I believe that the crossover has dual inputs and would work in this type of scenario. Here's the link to the set, including the crossover: http://www.focal-america.com/catalog/utopia/165w.htm I'm hoping to optimize my current setup and properly use the four channels to bi-amp. I'm thinking that I'd be better served by directing the power to the components instead of the rear fill. In your opinion, would this work while maintaining sound quality?