Well, I now have my TOTL home system complete...for the time being
Upgraded my B&W Matrix 1 series 1s with a pair of Matrix 3 Series 2. Not a whole lot of difference. The 3s do sound a bit fuller and they are 5db more sensitive (90 vs. 85 on the 1s). The sound coming from my system now is absolutely sublime...as close to live as I've ever heard from a recording.
I also have the full story on the evolution of the Matrix series to the 800 series, according to
Doug Schneider at Sound Stage...
"A while after that initial Matrix 1, 2, and 3 lineup, B&W gave their much-heralded 801 the Matrix treatment and dubbed it the 801 Series 2. The audio world had heart palpitations. Although some disagreed, many called it the greatest dynamic speaker of the day. Stereophile's Lewis Lipnick crowned it Class A and that was that. Soon afterwards their longstanding 802 became one of the Matrix brethren and it too carried the Series 2 moniker.
B&W seemed to like that Series 2 name so gosh-darn much that when they released a new version of the Matrix 1, 2, and 3 lineup they tacked Series 2 to the end of that too. However, from what I could tell the consumer world didn't seem to like the 'Series' part of the name as much as they liked seeing 800 up in front. The B&W 800 series quickly became known as the upscale B&W line.
Being the smart marketers B&W are, they latched onto the 800 name pronto and brought out a mucho expensive 800 speaker (Series 1 implied, I'd imagine). Seeing as they already had an 801 and 802 (in Series 2 form) it seemed only logical to scrap the Matrix 1, 2, and 3, redesign 'em, then call them 803, 804, and 805 (Series 1 implied of course)."