Upgrade-ing B&W P6

A friend of mine owns B&W Preference 6 loudspeakers for some time and now feels ready to "upgrade" them. Does anybody have experience with this specific speaker series (or similar B&W design)? When recommending, please, be specific what caps to use in the crossover, what cables/wires to use for inner speaker wiring, etc. Any suggestion/recommendation is welcome...
Best regards,
hi dave.

the best advise is to listed to the 800 series. 801s 802s 803s 804s and the 805s or go lstd to the sig series, i have all and i have varied amouts of other brand speakers. they all sound god if you match them with the right gear. you could spend 25 grandf and have a speaker sound l;ike well s--t. if ya know what i mean. b&w makes a great speaker would cllass and customer service is the best. think before you jumt into the pot.

pat.a stang500hp@aol.com
Read the AudioReview.com posts for the original B&W CDM-1 speakers. There is a fairly detailed description of how to upgrade the crossover of the CDM-1. You can also contact the person who made the post for more information. The original CDM-1 and the P6 both use a First-Order crossover, so they should be similar in design.
I had a pair of P6's and loved them. My ex has them now and I upgraded to the 802 s 111's
I still want a pair of P6's for my bedroom.