well that changes everything hahaa. Defintely go ported if you can.Nissan 370z, and I'd give up the entire trunk if I had too.
zen makes a nice box. i would get a fi ssd with the high qts option to optimize it for sealedhttp://www.amazon.com/Zenclosures-Nissan-370z-1-12-Subwoofer/dp/B00BPEQ2CU
That is the box I am planning on purchasing. I'm hoping to keep the same deck in the car. Willing to spend 3-400 on subs and amp