Top cabinet
One - (Raven 2 *or* Sa8535 isodynamic - 103db)
Four - 6.5" - (Audax PR170M0 *or* PHL 1120 *or* PHL 1230)

Bass cabinet (this is where I have problems deciding)
one - prosound 12 inch (PHL ?, eminence ?, etc.. ??????)
one - prosound 18 inch (kilomax 18? PHL? JBL? or Lamdba 15" ? etc.)

Seperate subwoofer (use vented?) - 18 inch (blueprint 1803?, leviathan ?, Brahma ?, Maelstron? etc)

That is the reason I was thinking sealed for Kilomax 18. Many folks
on the forums think that sealed would sound slightly better for
bass quitar reproduction over the vented. Since I plan to add
a subwoofer anyways, I was seeking a prosound woofer that would
at least f3 around 40-45hz so I can have some tight bass. But
most of the other prosound woofers except kilomax do f3 around 60-80hz.
I'm not sure what the pro's and con's are if my woofer
cabinet *and* subwoofer cabinet are vented as opposed to one
being sealed and the subwoofer is vented.

Normally if I had an R&D budget, I would just buy all these good
woofers and test them out, but I can't afford to do so.. I've
been reasearching all the audio forums compiling data to get
headed in the right direction. So many good ideas out here,
time to digest all the data and settle on a design so I can
terrorize the neighbors with some loud and clean tunes (hehehe)