CDT CL62cf
Diamond Audio s6 6.5 comps
"8" Eminence Speakers

 

cl62cf is what i will be installing soon, one i heard them i loved the sound

 

Eminence is the loudest

 

That is a loaded question. Do you already have amps to power them? How much power on tap? What badwith do you want them to cover?

The things you need to look at are efficiency, XMAX, and size. A higher efficiency speaker will be louder (3db difference equals double the power)....BUT they generally don't play as low and roll off sooner. A higher XMAX can generally take more power before it runs out of excursion...BUT the speaker will either need a large box (large door) or you will lose efficiency. A larger speaker will displace a greater volume of air and will therefore be louder...BUT it is usually harder to fit and can sometimes take more power to realize the full potential (it will still have the efficiency/enclosure size/XMAX trade-offs too).

 

Heard nothing but good stuff about CDT's stuff, take into consideration everything in the post above as well. Efficiency will be a big factor in determining "loudness"