I own the MA RS 8,s and my Daughter the Rocket 550 MK II. The MA 8 's have a bit more bass than the 6's, and some believe the 6's sound better because of it.
My preference is for the MA's, while my daughter the 550MK II. I definatly have no problem with the 550 MK II. Nice sounding speaker and there cabinet is gorgeous.
When my daughter asked me to buy her some speakers , front , center and sub,with a not to excede price,it was B stock Rockets that I looked for.If you have ever been on AV123 website, you know how difficult that is.Very seldom do you find B-stock/open box specials.When they do show up, they are not there for long.
They have a very devoted fan base, not only because of there products, but also because it is not unusual to talk directly to there owner when you have a problem or just questions.
I know because of my exsperence with AV123, I will always give there products ,in the future, careful consideration.