Bi Amping my B&W Matrix 800s

I have been thinking about bi amping my B&W 800 Matrix . I am now using a Krell FPB 600 with a Mark Levinson 38s preamp and a Krell B&W 800 Series bass Alignment Filter. With the B&W Matrix 800 speakers being quad wired. I have been considering buying a Krell FPB 300 to bi amp with my Krell FPB 600 using the Krell FPB 600 for the 4 woofers (2 on ea. speaker) on my 2 B&W 800 Matrix and the Krell FPB for the tweeters and midrange on ea. B&W 800 Matrix . Can this be done with my Mark Levinson 38s preamp? Would bi amping really do justice for my B&W Matrix 800s? And how difficult would it be ? Thank you all .Mike 
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And even if you keep things as is, the caps in the passive crossovers already need replacing.
edwyn when i put my 800s together and the caps in the passive crossovers looked great. And they sound fantastic. So how can you tell me they need replacing? 
Mine looked great too.  But they did not measure well on the LCR meter.  I replaced them and I recovered  some better low freq response I didnt know I had lost.  These matrix series were built in the late 80s to early 90s so that is not unexpected.
Also they are no joke to take apart and put back together especially when u live alone.