about to start new zcon build

[frogcase2002 393]

Currently I have a 15" zcon in a 4th order bp ported through rear deck. Going to be getting 2 12" zcons and trying to think of what kind of box to start on. 4th . 6th. Ported with trunk sealed off? Which ever one I chose I'm going to be porting through my rear deck.. I think I can get about 9 or 10 cubes if I pretty much Max the trunk out .which I could do...

Just seeing if anyone has any opinions on anything that will help me make up my mind? If you got any questions just ask. Going to be running 4 - 5k. Maybe a little more. Wanting to get started a.s.a.p. thanks.