hey man i have a type R right now and my trunk bumps hard. i can design and make you a box, and can guide you on your system. for the money the type R's are hard to beat. as for how many subs and what size, that depends on what kind of sound you want. as for the amp, hifonics is very good. here is a picture of my curent setup. my AIM is psturmer, we can talk on there. i will be on later tonight.