>>I am intressting to do a line arrays with 10 pices of Adire
>>Extremis 6.8 and 10 pices of aurum cantus G1 (each side). Should be a cool project.
>>Do you think this is a god project?
Do you mean Good project or God project?
It's a very good project, but I can think of Godlier
designs if your wallet is fatter 
>>Should i go for closed box or vented box?
Make a scale down test box, rear ported, then plug the hole to make
it a sealed box. Listen to both ported and sealed, what do you
prefer sonically ?