Box help

I have a set of 2 12" rockford fosgate he's that i am building a box for them and later upgrading them to possibly jl.would 3/4" particle board be addiquit because the idiots around here don't seem to know what mdf board is, and few people around here know crap about audio, i want a wedge type 2 box
My dimensions are:
Width: 34"
Hight:16"
Bottom Depth: 18"
Top Depth: 8"
Barrier separating the chambers
not sure on the back size yet
it will have a 2" lip on the front
www.the12volt.com (http://www.the12volt.com) calculator says that it has about 3.13 cubic feet
would this be a decent box for the rockford he's, and later for an upgrade
also, what would be a decent amp for the subs for fairly cheap (400W max, 200W rms, Alpine cde-9842 deck)
thanks

what kind of displacement do the subs have i have i box cut sheet on excel and i'll check for you
and if you desire to port i can help you on that 2

what kind of displacement do the subs have i have i box cut sheet on excel and i'll check for you
and if you desire to port i can help you on that 2

my sheet says you have 4.25 cube feet with the measurements you posted

if you have 3.13 cube feet your driver displacement is 1.37 am i right

my latest measurments;
top - 10
bottom - 18
front - 16
back 14
i went to http://www.the12volt.com/caraudio/boxcalcs.asp#wed2
I got 3.40893 cubic feet, thats not including the divider

im not sur how to measure the divider