i love Mb Quart and swear by their quality and clarity, i have a QM218.61Q set pretty much like yours with the crossovers and tweeters but i also bought a MTX Thunder8302 series amp that is going to power them. Ive had it for about a year and haven't put them in because my carwas broken into at college and all of my subwoofer setup was stolen so im a lil tenative to put more things in, but let us all know how they sound.