more bookshelf speaker help

[martix_agent]

I'm sure some of you remember me, I made a post about bookshelf speakers earlier. I posted more information in it earlier ths week but it got overlooked

After much thought I've nearly decided what I want to build. I'd like some help determining what size box i need though before I decide. I've also heard that using insulation can decrease the box size. Is that true? type the part number into parts-express. apparently the links die quickly.
setup #1:
275-075 x3(one for each speaker, one for the center speaker)
295-362[/url] x2 (one for each speaker)
295-360 x1(for the center speaker)

setup #2:
275-075 x3(one for each speaker, one for the center speaker)
295-360 x3(one for each speaker, one for the center speaker)

setup#3:
275-075 x3(one for each speaker, one for the center speaker)
295-360x5 (two for each speaker, one for the center speaker)