advice on speakers

ok looking to upgrade speakers again.

i have narrowed my choices down to this:

front doors: cdt-62 or 62z's,or mb-pce216's,or the hex s600s    to be run off memphis 4 channel amp     

right now have mb-dkd113's in back door and was thinking about leaving them in

2-eclipse sw8112 in a custom 1.25cft sealed  off a memphis 1000d

hu-pioneer p-840mp

looking fo best sq with enough clean bass to fill the cab

questions: will i need to run any mid bass speakers, also the amp is 1000watts at 1 ohm, would i get better sound by adding another amp and runnig both at 1000 or dropping them down to 2 ohm at about 600 watts each.and which way to fire the subs ie: foward, up, or facing the back of cab

'any advice or opionons

;

You really need to listen to those speakers.  I haven't heard the CDTs but have heard the Mb Quart PCE and Diamond Hex series.  Your highs will sound different and slightly brighter with the Quart's because of the metal tweeter (opposed to the silk tweeter on the 600s Hex).  Some people like this, others don't.  Silk tweeters are generally smoother, but their sound tends to change (dull) over time because of the harsh environment of the car.  Similar material and construction differences exist between the midranges - creating different sounding speakers.  They both sound good, but different.  It is best if you decide which one you prefer first hand. 

I picked the Quart's over the Diamond series because I enjoy very crisp highs and detailed vocal ranges.  I primarily listen to jazz and classical and thought Quart was stronger in these two areas. 

Hope this helps some.