rf t20001bd with 2 15 06cvxcomp

I am getting a new upgrade with a RF T20001bd pushing 2 15" Kicker 06CVXcomp.

Im changing from a PG Tantrum 1200.1 pushing 4 12" Hertz ES300. I can sell all of my existing and surplus equipment and swap with only a little to pay extra.  All three brand new would cost me about $1000.

I just keep wanting more bass with each upgrade and I hope this combo with a custom ported box would be what Im lookin for. I dont want to upgrade again. Im lookin for the bass that will hammer the breath right out of me.

My truck is a 91 Silverado ext cab with no back seat. Im also looking for any ideas or diagrams on building the box or boxes. I would like to have them downfiring with slot vents but dont know how to build a box like that. I would like to try if it is too difficult. If I have to I will build it so it will be facing the back of the seat because it was the best way it sounded with every setup. My max dimensions are 58Wx17Hx20D. And should it be 1 box or 2?

So is this the right type of setup for what I want and is the price very good?

I keep thinking I should pull the trigger on this. What do you think?