My Rainbow Garmaniums that I had installed a few days ago were initially one of the brightest setups I've ever had in one of my cars. This is just because of the tweeter position though... they're in the factory location above the mids and are angled inward so they're higher and more on-axis than the mids. The crossovers are pretty flexible though so between them and the equalizer I was able to get it to a level I enjoy more. I haven't heard the newer MB Quart Q's but I owned a couple older Premium line models and I like the Germaniums a lot more. They're just as detailed and have much more mid-bass impact than the Quarts I owned.
$10,000 is a lot of money for a system. If you spend some of that money on a quality install and some processing it should pretty much sound however you want it to. What kind of car?
