I was in the same spot you were a few weeks ago. I could not decide between the CDT ES-620s up front or the MB Quart QSD-216s. So I did what any car audio freak with too much expendable income would.... I ordered both. I am still doing drilling/welding/etc in my car so I have not had a chance to mount them in car. Right now I am powering them off of my in home THX receiver with them mounted on a board in my living room (single guys do not have a SAF to worry about) and
HOLY **** are the QSD-216s amazing. You
do not need coaxials in the back at all. If I had that Van Gogh amp I would bridge it out to 2 channels for a pair of the QSDs up front and tune it back to around 250 watts RMS (unless you are deaf and would actually crank it up to max, then tune it back to 170watts per channel). The CDT ES-620s are OK speakers, but my ears cannot handle the crossover on them. Things gets mushy in the middle and they do not have the clarity of the QSDs. Even with the system mounted on a board in my living room I absolutely lose myself in the QSDs. I can put a CD in and listen to the entire thing without ever asking myself the question "was that in the source or was that the speakers breaking up?". I could not get that with the CDTs. I am still planning on mounting both sets in my car. I will give each of them a week of break in and a week of critical listening..... I am already terribly biased towards the QSDs, though
