Comp VR setup for my amp?

Hey guys. I'm having a bit of trouble deciding what subs to run with my amp in my new car. I have pretty well decided on the Kicker Comp VR series. In my old car I had a pair of Kicker Comp 10's (05 Model) running off of an Infinity 310a mono amp, 300 watts x 1 @ 2 ohm. I was happy with that setup. Each of those subs were in its own 1.0 ft^3 box. Unfortunately though I sold that setup with my old car (buyer wanted to drop the price of the vehicle more than what I paid for the setup otherwise, lol). For my new car I have bought a Phoenix Gold Xenon x400.1 monoblock amp. Its birth certificate from PG shows 407.7 watts @ 14.34 volts @ 1kHz and has the CEA certificate for 410 watts @ 14.4 volts @ 1kHz. This amp has a stable output of 400 watts from 1 to 4 ohms, so I can pretty well acomadate anything. I thought I'd step up to the Comp VRs with this car. What combo would you guys recommend to maximize the power availible? I'm open to any options from single or dual 10's or 12's. I've even thought about 8s, but won't that be a lot quieter than 10's or 12's? I like tighter bass. If you'd like to know the rest of my setup my car is a 2000 Subaru Legacy, Pioneer DEH-P80MP HU which is powering Infinity 6010cs 6.5" components up front. The rears are stock, and are only turned on when I have passengers back there. Thanks in advance for the input.

I forgot to mention that I am temporarily running a single Infinity 1230w until I get my new sub/s. Its mounted inverted in a 1.15 ft^3 box that I built. Its ok, but distorts @ higher volume levels (Its only rated for 300 watts rms).

Personally I would keep that Infinity 1230w. Did you set your gain properly? It should be able to handle 400watts rms fine and sound damn good in a sealed enclosure. Is it inverted vertically?

I'm not positive what you mean by "vertically" but I have the sub positioned with the magnet on the exterior of the box, facing towards the rear of the trunk. I thought it sounded better this way than with the sub inside the box.

What about running a single 10" or 12" L5??? Anyone run these in a sealed enclosure?

How did you set your gain?

You need to set your gain using a test tone. Do a search for "gain" on here and there is tons of info on how to properly set your gain. Once your gain is set correctly that Inifinity sub should sound very good and you may just want to save some money and keep it.