Digitaldirectuk.com selling the above Panny plasmas for £2270 and £2295 respectively, UK stock too......very good price, especially for the silver PW6 inc. scart board!!
It used to be that the black ones were for "professional" use and had different software options to the silver ones - an advanced colour option, more ratios for component input, that sort of thing. Has that changed?
You could still hack the silver ones to allow for the extra functionality, but you had to go through various remote control operations and sacrifice a goat.