Advice for SX 15's

[oneup]

First off, hello!

I thought that I'd go here and get some advice for my (near)future buildup. I've got a 96 s10 Ex cab. I have three SX 15's thats going in the cab. I'm going for a bass race, daily driver, I've come up with 11cu? net volume, about 160? inches of port, tuned at 35hz? I've been going on and off about a wall. I can get enough space with out a wall. But I could build it more solid with one. Grrrrr!

I have two Orion 2500's, and a nice electrical system. I don't really have any experience with RE stuff, so is that going to be enough/too much power?

I also have a severe problem with the roof flexing, with two planet audio BB 15's it will flex 3 or 4 inches. Its cracking up the paint real bad. What a good way to handle that. I have two layers of hush-mat on it already