Anyone know much about the differing B&W product lines? "year to year"

What years were the CM2 made? How many incarnations of the 685?

Which B&W bookshelf speakers still use a a 6.5 inch mid bass? Any have rear facing duct?

What is the cheapest "all euro" B&W speaker?

What is the cheapest dual mid-bass driver speaker?

Inquiring minds want to know - but - they also see too many "stale web pages" :-(

I want really good bookshelf speakers - what is the BW sweet spot - under $1000 or isn't there one?