I just bought two type R that replaced my JBL W12GTi MKII and wow. Big difference, not only were they Louder but sound so much better. I have heard every Kicker except the X and I don't think they compare. The Type R is rated for 500 watts RMS, I am pounding each with 1500 watts RMS and it still wants more. I would definetely put them in a ported box. Sealed blows, I have mine in a Pontiac G6 with 2.25 ported box with the slot port being 10x2x13 and it sounds awesome. Great sounding with all genres of music. Plus, I would be willing to bet that with my seats down I am probably hiting close to 150 DB because it is hard to swollow. Thats my 2 cents. Go with type R's bro